diff --git a/Containers/mastercontainer/mastercontainer.conf b/Containers/mastercontainer/mastercontainer.conf
index 7d294694..73a13e6b 100644
--- a/Containers/mastercontainer/mastercontainer.conf
+++ b/Containers/mastercontainer/mastercontainer.conf
@@ -21,6 +21,11 @@ Listen 8080 https
     <FilesMatch "\.php$">
         SetHandler "proxy:fcgi://127.0.0.1:9000"
     </FilesMatch>
+
+    # Disable output buffering to enable streaming responses.
+    <Proxy "fcgi://127.0.0.1:9000/" enablereuse=on flushpackets=on max=10>
+    </Proxy>
+
     # Master dir
     DocumentRoot /var/www/docker-aio/php/public/
     <Directory /var/www/docker-aio/php/public/>
diff --git a/php/composer.json b/php/composer.json
index 892bdd5d..de8be9d8 100644
--- a/php/composer.json
+++ b/php/composer.json
@@ -16,7 +16,8 @@
 		"http-interop/http-factory-guzzle": "^1.2",
 		"slim/twig-view": "^3.3",
 		"slim/csrf": "^1.3",
-		"ext-apcu": "*"
+		"ext-apcu": "*",
+		"slim/psr7": "^1.8"
 	},
 	"require-dev": {
 		"sserbin/twig-linter": "@dev",
diff --git a/php/composer.lock b/php/composer.lock
index a1195b25..accd19b5 100644
--- a/php/composer.lock
+++ b/php/composer.lock
@@ -4,8 +4,64 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "19598625395cc28e64f15d2719f8f98f",
+    "content-hash": "a47e950885b06f1a4b631a1eea56c57e",
     "packages": [
+        {
+            "name": "fig/http-message-util",
+            "version": "1.1.5",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/http-message-util.git",
+                "reference": "9d94dc0154230ac39e5bf89398b324a86f63f765"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/php-fig/http-message-util/zipball/9d94dc0154230ac39e5bf89398b324a86f63f765",
+                "reference": "9d94dc0154230ac39e5bf89398b324a86f63f765",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^5.3 || ^7.0 || ^8.0"
+            },
+            "suggest": {
+                "psr/http-message": "The package containing the PSR-7 interfaces"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.1.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Fig\\Http\\Message\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "https://www.php-fig.org/"
+                }
+            ],
+            "description": "Utility classes and constants for use with PSR-7 (psr/http-message)",
+            "keywords": [
+                "http",
+                "http-message",
+                "psr",
+                "psr-7",
+                "request",
+                "response"
+            ],
+            "support": {
+                "issues": "https://github.com/php-fig/http-message-util/issues",
+                "source": "https://github.com/php-fig/http-message-util/tree/1.1.5"
+            },
+            "time": "2020-11-24T22:02:12+00:00"
+        },
         {
             "name": "guzzlehttp/guzzle",
             "version": "7.10.0",
@@ -1146,6 +1202,85 @@
             },
             "time": "2025-11-02T14:58:28+00:00"
         },
+        {
+            "name": "slim/psr7",
+            "version": "1.8.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/slimphp/Slim-Psr7.git",
+                "reference": "76e7e3b1cdfd583e9035c4c966c08e01e45ce959"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/slimphp/Slim-Psr7/zipball/76e7e3b1cdfd583e9035c4c966c08e01e45ce959",
+                "reference": "76e7e3b1cdfd583e9035c4c966c08e01e45ce959",
+                "shasum": ""
+            },
+            "require": {
+                "fig/http-message-util": "^1.1.5",
+                "php": "^8.0",
+                "psr/http-factory": "^1.1",
+                "psr/http-message": "^1.0 || ^2.0",
+                "ralouphie/getallheaders": "^3.0"
+            },
+            "provide": {
+                "psr/http-factory-implementation": "^1.0",
+                "psr/http-message-implementation": "^1.0 || ^2.0"
+            },
+            "require-dev": {
+                "adriansuter/php-autoload-override": "^1.5|| ^2.0",
+                "ext-json": "*",
+                "http-interop/http-factory-tests": "^1.0 || ^2.0",
+                "php-http/psr7-integration-tests": "^1.5",
+                "phpstan/phpstan": "^2.1",
+                "phpunit/phpunit": "^9.6 || ^10",
+                "squizlabs/php_codesniffer": "^3.13"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Slim\\Psr7\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Josh Lockhart",
+                    "email": "hello@joshlockhart.com",
+                    "homepage": "https://joshlockhart.com"
+                },
+                {
+                    "name": "Andrew Smith",
+                    "email": "a.smith@silentworks.co.uk",
+                    "homepage": "https://silentworks.co.uk"
+                },
+                {
+                    "name": "Rob Allen",
+                    "email": "rob@akrabat.com",
+                    "homepage": "https://akrabat.com"
+                },
+                {
+                    "name": "Pierre Berube",
+                    "email": "pierre@lgse.com",
+                    "homepage": "https://www.lgse.com"
+                }
+            ],
+            "description": "Strict PSR-7 implementation",
+            "homepage": "https://www.slimframework.com",
+            "keywords": [
+                "http",
+                "psr-7",
+                "psr7"
+            ],
+            "support": {
+                "issues": "https://github.com/slimphp/Slim-Psr7/issues",
+                "source": "https://github.com/slimphp/Slim-Psr7/tree/1.8.0"
+            },
+            "time": "2025-11-02T17:51:19+00:00"
+        },
         {
             "name": "slim/slim",
             "version": "4.15.1",
@@ -4825,5 +4960,5 @@
         "ext-apcu": "*"
     },
     "platform-dev": {},
-    "plugin-api-version": "2.9.0"
+    "plugin-api-version": "2.6.0"
 }
diff --git a/php/public/forms.js b/php/public/forms.js
index 3adc3997..e9e2b952 100644
--- a/php/public/forms.js
+++ b/php/public/forms.js
@@ -79,6 +79,17 @@ function showPassword(id) {
     for (const form of forms) {
       initForm(form);
     }
+    const overlayLogForms = document.querySelectorAll('form[target="overlay-log"]')
+    for (const form of overlayLogForms) {
+        form.onsubmit = function() {
+            enableSpinner();
+            document.getElementById('overlay-log')?.classList.add('visible');
+            // Reload the page after the response was fully loaded into the iframe.
+            document.querySelector('iframe[name="overlay-log"]').addEventListener('load', () => {
+                location.reload();
+            });
+        };
+    }
   }
 
   if (document.readyState === 'loading') {
diff --git a/php/public/style.css b/php/public/style.css
index b35883d0..fda50e57 100644
--- a/php/public/style.css
+++ b/php/public/style.css
@@ -471,6 +471,26 @@ input[type="checkbox"]:disabled:not(:checked) + label {
     display: block;
 }
 
+#overlay #overlay-log.visible {
+    visibility: visible;
+    opacity: 1;
+    transition: opacity 1s ease-in;
+}
+
+#overlay #overlay-log {
+    visibility: hidden;
+    opacity: 0;
+    position: absolute;
+    top: calc(50% + 120px);
+    width: 20%;
+    height: 5rem;
+    margin: 0 39%;
+    padding: 1rem 1.5rem;
+    border-radius: 10px;
+    border: solid thin rgb(192, 192, 192);
+    background-color: rgba(128, 128, 128);
+}
+
 .loader {
     border: 16px solid var(--color-loader);
     border-radius: 50%;
@@ -705,4 +725,4 @@ input[type="checkbox"]:disabled:not(:checked) + label {
     .office-suite-cards {
         grid-template-columns: 1fr;
     }
-}
\ No newline at end of file
+}
diff --git a/php/src/Controller/DockerController.php b/php/src/Controller/DockerController.php
index 81b920d0..33fe8ac9 100644
--- a/php/src/Controller/DockerController.php
+++ b/php/src/Controller/DockerController.php
@@ -8,6 +8,7 @@ use AIO\Docker\DockerActionManager;
 use Psr\Http\Message\ResponseInterface as Response;
 use Psr\Http\Message\ServerRequestInterface as Request;
 use AIO\Data\ConfigurationManager;
+use Slim\Psr7\NonBufferedBody;
 
 readonly class DockerController {
     private const string TOP_CONTAINER = 'nextcloud-aio-apache';
@@ -19,12 +20,12 @@ readonly class DockerController {
     ) {
     }
 
-    private function PerformRecursiveContainerStart(string $id, bool $pullImage = true) : void {
+    private function PerformRecursiveContainerStart(string $id, bool $pullImage = true, ?NonBufferedBody $body = null) : void {
         $container = $this->containerDefinitionFetcher->GetContainerById($id);
 
         // Start all dependencies first and then itself
         foreach($container->dependsOn as $dependency) {
-            $this->PerformRecursiveContainerStart($dependency, $pullImage);
+            $this->PerformRecursiveContainerStart($dependency, $pullImage, $body);
         }
 
         // Don't start if container is already running
@@ -36,7 +37,13 @@ readonly class DockerController {
 
         $this->dockerActionManager->DeleteContainer($container);
         $this->dockerActionManager->CreateVolumes($container);
+        if ($body) {
+            $body->write("<div>{$container->displayName}: Pulling image</div>");
+        }
         $this->dockerActionManager->PullImage($container, $pullImage);
+        if ($body) {
+            $body->write("<div>{$container->displayName}: Starting container</div>");
+        }
         $this->dockerActionManager->CreateContainer($container);
         $this->dockerActionManager->StartContainer($container);
         $this->dockerActionManager->ConnectContainerToNetwork($container);
@@ -197,17 +204,29 @@ readonly class DockerController {
         if ($pullImage === false) {
             error_log('WARNING: Not pulling container images. Instead, using local ones.');
         }
+        
+        $nonbufResp = $response
+            ->withBody(new NonBufferedBody())
+            ->withHeader('Content-Type', 'text/html; charset=utf-8')
+            ->withHeader('X-Accel-Buffering', 'no')
+            ->withHeader('Cache-Control', 'no-cache');
+        // Text written into this body is immediately sent to the client, without waiting for later content.
+        $body = $nonbufResp->getBody();
+        
+        $body->write($this->getStreamingResponseHtmlStart());
+        
         // Start container
-        $this->startTopContainer($pullImage);
+        $this->startTopContainer($pullImage, $body);
 
         // Clear apcu cache in order to check if container updates are available
         // Temporarily disabled as it leads much faster to docker rate limits
         // apcu_clear_cache();
 
-        return $response->withStatus(201)->withHeader('Location', '.');
+        $body->write($this->getStreamingResponseHtmlEnd());
+        return $nonbufResp;
     }
 
-    public function startTopContainer(bool $pullImage) : void {
+    public function startTopContainer(bool $pullImage, ?NonBufferedBody $body = null) : void {
         $this->configurationManager->aioToken = bin2hex(random_bytes(24));
 
         // Stop domaincheck since apache would not be able to start otherwise
@@ -215,7 +234,7 @@ readonly class DockerController {
 
         $id = self::TOP_CONTAINER;
 
-        $this->PerformRecursiveContainerStart($id, $pullImage);
+        $this->PerformRecursiveContainerStart($id, $pullImage, $body);
     }
 
     public function StartWatchtowerContainer(Request $request, Response $response, array $args) : Response {
@@ -307,4 +326,26 @@ readonly class DockerController {
         $id = 'nextcloud-aio-domaincheck';
         $this->PerformRecursiveContainerStop($id);
     }
+
+    private function getStreamingResponseHtmlStart() : string {
+        return <<<END
+        <!DOCTYPE html>
+        <html lang='en'>
+            <head>
+                <style>
+                    body { font-family: sans-serif; color: white; }
+                </style>
+                <script>
+                    const observer = new MutationObserver((records) => records[0].addedNodes[0].scrollIntoView());
+                    observer.observe(document, {childList: true, subtree: true});
+                </script>
+            </head>
+            <body>
+            
+        END;
+    }
+    
+    private function getStreamingResponseHtmlEnd() : string {
+        return "\n  </body>\n</html>";
+    }
 }
diff --git a/php/templates/containers.twig b/php/templates/containers.twig
index 8e437bc2..9bab741b 100644
--- a/php/templates/containers.twig
+++ b/php/templates/containers.twig
@@ -338,7 +338,7 @@
                                 </form>
                             {% else %}
                                 {% if was_start_button_clicked == false %}
-                                    <form method="POST" action="api/docker/start" class="xhr">
+                                    <form method="POST" action="api/docker/start" target="overlay-log">
                                         <input type="hidden" name="{{csrf.keys.name}}" value="{{csrf.name}}">
                                         <input type="hidden" name="{{csrf.keys.value}}" value="{{csrf.value}}">
                                         <input id="base_path" type="hidden" name="base_path" value="">
@@ -355,7 +355,7 @@
                                         <input type="submit" value="Start containers" />
                                     </form>
                                 {% else %}
-                                    <form method="POST" action="api/docker/start" class="xhr">
+                                    <form method="POST" action="api/docker/start" target="overlay-log">
                                         <input type="hidden" name="{{csrf.keys.name}}" value="{{csrf.name}}">
                                         <input type="hidden" name="{{csrf.keys.value}}" value="{{csrf.value}}">
                                         <input id="base_path" type="hidden" name="base_path" value="">
diff --git a/php/templates/layout.twig b/php/templates/layout.twig
index 79c615d9..f0cb9259 100644
--- a/php/templates/layout.twig
+++ b/php/templates/layout.twig
@@ -13,6 +13,7 @@
         </div>
         <div id="overlay">
             <div class="loader"></div>
+            <iframe name='overlay-log' id="overlay-log"></iframe>
         </div>
         <button id="theme-toggle" onclick="toggleTheme()">
             <span id="theme-icon"></span>