feat(Mobilizon): Add default port

mobilizon/docker-compose.local.yml

@@ -5,4 +5,4 @@ version: "3.8"
 services:
   mobilizon:
     ports:
-      - "4000:${MOBILIZON_PORT:-4000}"
+      - "${MOBILIZON_INSTANCE_PORT:-4000}:${MOBILIZON_PORT:-4000}"

mobilizon/docker-compose.yml

@@ -21,7 +21,7 @@ services:
     environment:
       MOBILIZON_INSTANCE_NAME: ${MOBILIZON_INSTANCE_NAME}
       MOBILIZON_INSTANCE_HOST: ${MOBILIZON_DOMAIN}
-      MOBILIZON_INSTANCE_PORT: ${MOBILIZON_INSTANCE_PORT}
+      MOBILIZON_INSTANCE_PORT: ${MOBILIZON_INSTANCE_PORT:-4000}
       MOBILIZON_INSTANCE_EMAIL: ${MOBILIZON_INSTANCE_EMAIL}
 
       MOBILIZON_REPLY_EMAIL: ${MOBILIZON_REPLY_EMAIL}