Small update to README.md, replace twitter with mastodon

Author: rolandgeider

README.md

@@ -3,14 +3,20 @@
 
 # docker compose stacks for wger
 
-The prod docker compose file starts up a production environment with the application
-server, a reverse proxy, a database, a caching server and a celery queue all 
-configured.
+The production Docker Compose file initializes a production environment with the
+application server, a reverse proxy, a database, a caching server, and a Celery
+queue, all configured. Data is persisted in volumes, if you want to use folders,
+read the warning in the env file.
 
-Basically, just do `docker compose up -d`. For more details, consult the documentation:
+**TLDR:** just do `docker compose up -d`
 
-* prod: <https://wger.readthedocs.io/en/latest/production/docker.html>
-* dev: <https://wger.readthedocs.io/en/latest/development/docker.html>
+For more details, consult the documentation (and the config files):
+
+* production: <https://wger.readthedocs.io/en/latest/production/docker.html>
+* development: <https://wger.readthedocs.io/en/latest/development/docker.html>
+
+It is recommended to regularly pull the latest version of the compose file,
+since sometimes new configurations or environmental variables are added.
 
 ## Contact
 
@@ -19,9 +25,9 @@ didn't behave as you expected. We can't fix what we don't know about, so please
 report liberally. If you're not sure if something is a bug or not, feel free to
 file a bug anyway.
 
-* discord: <https://discord.gg/rPWFv6W>
-* issue tracker: <https://github.com/wger-project/docker/issues>
-* twitter: <https://twitter.com/wger_project>
+* Mastodon: <https://fosstodon.org/@wger>
+* Discord: <https://discord.gg/rPWFv6W>
+* Issue tracker: <https://github.com/wger-project/docker/issues>
 
 
 ## Sources