Update docker compose file and move env to own file.

docker-compose.traefik.yml

@@ -16,6 +16,8 @@ services:
     # expose port and/or use serving via traefik
     ports:
       - 8080:8080
+    env_file:
+      - .env
     # traefik configurations, including networks can be commented out if not needed
     networks:
       - traefik-ingress