Updated docs, new docker tags

doc/example/docker-compose.yml

@@ -3,12 +3,19 @@ services:
   app:
     image: jc21/nginx-proxy-manager:2
     restart: always
+    ports:
+      - 80:80
+      - 81:81
+      - 443:443
     volumes:
       - ./config.json:/app/config/production.json
       - ./data:/data
       - ./letsencrypt:/etc/letsencrypt
     depends_on:
       - db
+    environment:
+    # if you want pretty colors in your docker logs:
+    - FORCE_COLOR=1
   db:
     image: mariadb
     restart: always