Optimized default port

.gitignore

@@ -1,3 +1,4 @@
 app/config.yaml
 *__pycache__*
 app/static/cache/*
+.env

docker-compose.yml

@@ -8,7 +8,7 @@ services:
     image: application-portfolio
     container_name: portfolio
     ports:
-      - "${PORT:-5000}:5000"
+      - "${PORT:-5000}:${PORT:-5000}"
     volumes:
       - ./app:/app
     environment: