Merge pull request #3140 from nextcloud/enh/3052/add-init

add init flag to all containers

readme.md

@@ -87,6 +87,7 @@ The following instructions are meant for installations without a web server or r
     ```
     # For Linux and without a web server or reverse proxy (like Apache, Nginx, Cloudflare Tunnel and else) already in place:
     sudo docker run \
+    --init \
     --sig-proxy=false \
     --name nextcloud-aio-mastercontainer \
     --restart always \
@@ -101,6 +102,7 @@ The following instructions are meant for installations without a web server or r
     <summary>Explanation of the command</summary>
 
     - `sudo docker run` This command spins up a new docker container. Docker commands can optionally be used without `sudo` if the user is added to the docker group (this is not the same as docker rootless, see FAQ below).
+    - `--init` This option makes sure that no zombie-processes are created, ever. See https://docs.docker.com/engine/reference/run/#specify-an-init-process
     - `--sig-proxy=false` This option allows to exit the container shell that gets attached automatically when using `docker run` by using `[CTRL] + [C]` without shutting down the container.
     - `--name nextcloud-aio-mastercontainer` This is the name of the container. This line is not allowed to be changed, since mastercontainer updates would fail.
     - `--restart always` This is the "restart policy". `always` means that the container should always get started with the Docker daemon. See the Docker documentation for further detail about restart policies: https://docs.docker.com/config/containers/start-containers-automatically/
@@ -157,6 +159,7 @@ On Windows, install [Docker Desktop](https://www.docker.com/products/docker-desk
 
 ```
 docker run ^
+--init ^
 --sig-proxy=false ^
 --name nextcloud-aio-mastercontainer ^
 --restart always ^