add some documentation in compose files

docker-compose.override.yml

+# Define open ports on the service
 version: '3.1'
 services:
   webserver:

docker-compose.proxy.yml

@@ -39,12 +39,14 @@ services:
     - ./deploy/proxy.conf:/etc/nginx/proxy.conf
     networks:
     - proxy
-    
+
 networks:
   proxy:
     name: proxy
+    external: true
+    # Comment the rest of the definition if the network is already defined outside of the compose file
+    # for example by running docker network create command
     attachable: true
     driver: overlay
     driver_opts:
-      encrypted: 1
-    external: true
+      encrypted: 1
\ No newline at end of file
\ No newline at end of file

docker-compose.swarm.yml

+# This is the docker swarm version writtent to run with nginxproxy
 version: '3.7'
 services:
   webserver:

docker-compose.yml

+# Basic compose file mainly used to build the container image
 version: '3.1'
 services:
   webserver: