Added support for Overseerr (#26)

* Update README.md

* adding support for overseerr

* fixed wrong dictionary

* changed readme.md to shorten line 34
changed container_config.py, users_groups_setp.py to
        change  puid from 13010 to 13009
changed setup.sh changed puid for overseerr to 13009 and fixed
        chown command to use overeerr ID
changed main.py to only ask overeerr question if plex is chosen

README.md

@@ -31,6 +31,8 @@ crash*. It doesn't necessarily mean it will run well on your system ;) It featur
   what has been watched, who watched it, when and where they watched it, and how it was watched.
 - [Jellyfin](https://jellyfin.org/) is an alternative for PleX. Which you'd like to use is a matter
   of preference, and you *could* even use both, although this is probably a waste of resources.
+- [Overseerr](https://overseerr.dev/) is a show and movie request management and media discovery
+   tool.
 
 ## Using
 ### Using the CLI