improve steps in the readme

Signed-off-by: szaimen <[email protected]>

readme.md

@@ -16,10 +16,21 @@ Included are:
 
 ## How to use this?
 1. Install Docker on your Linux installations using:
+
 ```
 curl -fsSL get.docker.com | sudo sh
 ```
-2. Run the following command:
+2. Make sure that the docker group has the correct groupid:
+
+```
+sudo groupmod -g 998 docker
+```
+3. Make sure to pull the latest image:
+
+```
+sudo docker pull nextcloud/all-in-one:latest
+```
+4. Run the following command in order to start the container:
 
 ```
 sudo docker run -it \
@@ -32,7 +43,7 @@ sudo docker run -it \
 --volume /var/run/docker.sock:/var/run/docker.sock:ro \
 nextcloud/all-in-one:latest
 ```
-3. After the initial startup, you should be able to open the Nextcloud AIO Interface now on port 8080 of this server.<br>
+5. After the initial startup, you should be able to open the Nextcloud AIO Interface now on port 8080 of this server.<br>
 E.g. https://internal.ip.of.this.server:8080<br>
 If your server has port 80 and 8443 open and you point a domain to your server, you can get a valid certificate automatially by opening the Nextcloud AIO Interface via:<br>
 https://your-domain-that-points-to-this-server.tld:8443