Update to fix nginx proxy config for Docker Installs (#2908)

* Update to fix nginx proxy config

* Update docker-compose.yml - fix type

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Co-authored-by: Jax Gauthier <jax@gauthier.id>

docker/docker-compose.yml

@@ -16,8 +16,8 @@ services:
       - lemmyexternalproxy
     ports:
       # actual and only port facing any connection from outside
-      - "1236:1236"
-      - "8536:8536"
+      # Note, change the left number if port 80 is already in use on your system (or you want to run a reverse proxy outside this config)
+      - "80:80"
     volumes:
       - ./nginx.conf:/etc/nginx/nginx.conf:ro,Z
     restart: always