rename docker-compose files and remove unused network "app"

the default docker compose file should be minimal and easy to read as docker-compose.yml

other docker-compose variants for typical setup should be named as:
 docker-compose.<variant>.yml

this way one could use e.g. `docker compose -f docker-compose.traefik.yml up` to
start the variant for traefik. (mind keeping the file extension)

and fixed a typo the README.md

docker-compose.yml

@@ -16,23 +16,6 @@ services:
     # expose port and/or use serving via traefik
     ports:
       - 8080:8080
-    # traefik configurations, including networks can be commented out if not needed
-    networks:
-      - traefik-ingress
-    labels:
-      ## Traefik General
-      # We set 'enable by default' to false, so this tells Traefik we want it to connect here
-      traefik.enable: true
-      # define network for traefik<>app communication
-      traefik.docker.network: traefik-ingress
-      ## HTTP Routers
-      traefik.http.routers.whoami.entrypoints: https
-      traefik.http.routers.whoami.rule: Host(`lubelog.mydomain.tld`)
-      ## Middlewares
-      #traefik.http.routers.whoami.middlewares: authentik@docker
-      # none
-      ## HTTP Services
-      traefik.http.services.whoami.loadbalancer.server.port: 5000
 
 volumes:
   config:
@@ -40,8 +23,3 @@ volumes:
   documents:
   images:
   log:
-
-networks:
-  app:
-  traefik-ingress:
-    external: true