Make VPN port configurable in api service via environment variable

Added .idea to gitignore

Change-type: minor

docker-compose.yml

@@ -108,7 +108,7 @@ services:
       TOKEN_AUTH_JWT_ALGO: ES256
       TOKENS_CONFIG: API_SERVICE_API_KEY:hex,AUTH_RESINOS_REGISTRY_CODE:hex,COOKIE_SESSION_SECRET:hex,JSON_WEB_TOKEN_SECRET:hex,MIXPANEL_TOKEN:hex,SUPERUSER_PASSWORD:hex,TOKEN_AUTH_BUILDER_TOKEN:hex,VPN_GUEST_API_KEY:hex,VPN_SERVICE_API_KEY:hex,API_VPN_SERVICE_API_KEY:API_SERVICE_API_KEY,REGISTRY2_TOKEN:TOKEN_AUTH_BUILDER_TOKEN
       TRUST_PROXY: 172.16.0.0/12
-      VPN_PORT: 443
+      VPN_PORT: ${VPN_PORT:-443}
       WEBRESOURCES_S3_BUCKET: web-resources
       WEBRESOURCES_S3_REGION: 'us-east-1'  # this is required for minio