compose.yaml: add some more explanation and links to docs

Signed-off-by: Simon L. <szaimen@e.mail.de>

compose.yaml

@@ -1,8 +1,8 @@
 services:
   nextcloud-aio-mastercontainer:
-    image: ghcr.io/nextcloud-releases/all-in-one:latest
-    init: true
-    restart: always
+    image: ghcr.io/nextcloud-releases/all-in-one:latest # This is the container image used. You can switch to ghcr.io/nextcloud-releases/all-in-one:beta if you want to help testing new releases. See https://github.com/nextcloud/all-in-one#how-to-switch-the-channel
+    init: true # This setting makes sure that signals from main process inside the container are correctly forwarded to children. See https://docs.docker.com/reference/compose-file/services/#init
+    restart: always # This makes sure that the container starts always together with the host OS. See https://docs.docker.com/reference/compose-file/services/#restart
     container_name: nextcloud-aio-mastercontainer # This line is not allowed to be changed as otherwise AIO will not work correctly
     volumes:
       - nextcloud_aio_mastercontainer:/mnt/docker-aio-config # This line is not allowed to be changed as otherwise the built-in backup solution will not work
@@ -11,9 +11,9 @@ services:
     # networks: ["nextcloud-aio"]
     ports:
       - 80:80 # Can be removed when running behind a web server or reverse proxy (like Apache, Nginx, Caddy, Cloudflare Tunnel and else). See https://github.com/nextcloud/all-in-one/blob/main/reverse-proxy.md
-      - 8080:8080
+      - 8080:8080 # This is the AIO interface, served via https and self-signed certificate. See https://github.com/nextcloud/all-in-one#explanation-of-used-ports
       - 8443:8443 # Can be removed when running behind a web server or reverse proxy (like Apache, Nginx, Caddy, Cloudflare Tunnel and else). See https://github.com/nextcloud/all-in-one/blob/main/reverse-proxy.md
-    # security_opt: ["label:disable"] # Is needed when using SELinux
+    # security_opt: ["label:disable"] # Is needed when using SELinux. See https://github.com/nextcloud/all-in-one#are-there-known-problems-when-selinux-is-enabled
     # environment: # Is needed when using any of the options below
       # AIO_DISABLE_BACKUP_SECTION: false # Setting this to true allows to hide the backup section in the AIO interface. See https://github.com/nextcloud/all-in-one#how-to-disable-the-backup-section
       # APACHE_PORT: 11000 # Is needed when running behind a web server or reverse proxy (like Apache, Nginx, Caddy, Cloudflare Tunnel and else). See https://github.com/nextcloud/all-in-one/blob/main/reverse-proxy.md