Update .env

.env

@@ -1,7 +1,10 @@
+# Group and domain settings
 GROUP_ID=04
 DOMAIN=localhost
 URL_PREFIX=http://
 PORT_PREFIX=2
+
+# Environment postfixes
 DEV_POSTFIX=1
 STAG_POSTFIX=2
 PROD_POSTFIX=3
@@ -11,10 +14,15 @@ BACKEND_POSTFIX=4
 FRONTEND_POSTFIX=5
 GATEWAY_POSTFIX=6
 
+# Precomputed port prefixes
+DEV_PORT_PREFIX=${PORT_PREFIX}${GROUP_ID}${DEV_POSTFIX}  
+STAG_PORT_PREFIX=${PORT_PREFIX}${GROUP_ID}${STAG_POSTFIX} 
+PROD_PORT_PREFIX=${PORT_PREFIX}${GROUP_ID}${PROD_POSTFIX}  
+
 # Precomputed full port numbers
-DEV_GATEWAY_PORT=20416
-STAG_GATEWAY_PORT=20426
-PROD_GATEWAY_PORT=20436
-DEV_BACKEND_PORT=20414
-STAG_BACKEND_PORT=20424
-PROD_BACKEND_PORT=20434
+DEV_GATEWAY_PORT=${DEV_PORT_PREFIX}${GATEWAY_POSTFIX}  
+STAG_GATEWAY_PORT=${STAG_PORT_PREFIX}${GATEWAY_POSTFIX}  
+PROD_GATEWAY_PORT=${PROD_PORT_PREFIX}${GATEWAY_POSTFIX}  
+DEV_BACKEND_PORT=${DEV_PORT_PREFIX}${BACKEND_POSTFIX} 
+STAG_BACKEND_PORT=${STAG_PORT_PREFIX}${BACKEND_POSTFIX}  
+PROD_BACKEND_PORT=${PROD_PORT_PREFIX}${BACKEND_POSTFIX}