Update README.md

How to change the configuration

README.md

@@ -12,3 +12,23 @@ An install script to install jitsi meet for the [cvh-olp](https://gitlab.cvh-ser
 2. Start the containers with the provided scripts in cvh-olp.
 
 **Make sure that the port 10000/UDP is opened in the firewall for the jitsi-video-bridge.**
+
+## Configure Jitsi
+
+The configuration for Jitsi will be stored at ~/.jitsi-meet-cfg.
+That directory is mounted into the jitsi_web container.
+If you apply changes to these files they would be overriden at the next restart of the container.
+
+If you want to change some settings you have to go to the `docker-compose.yml` and change the
+mounting option from `:Z` to `:ro` for read only access to the files.
+After you have done that, your changes will apply after the next restart of the container.
+
+If the standard configuration should be restored, you can change the mount option back to `:Z` and restart the container.
+
+In case you want to change files inside the container e.g. the `index.html` of the Website.
+You could for example use the following command or something similar.
+
+```
+docker exec jitsi_web sed '"things_you_want_to_change"' /usr/share/jitsi-meet/web/index.html
+```
+