diff --git a/.env.example b/.env.example
index a387750..f7e87c6 100644
--- a/.env.example
+++ b/.env.example
@@ -1,16 +1,19 @@
 # Postgres
-POSTGRES_USER=USER
-POSTGRES_PASSWORD=PASSWORD
+POSTGRES_USER=DB_USER
+POSTGRES_PASSWORD=DB_PASSWORD
 POSTGRES_DB=DB_NAME
 # Database (postgresql)
-DATABASE_URL=postgresql://USER:PASSWORD@HOST:PORT/DB_NAME
+DATABASE_URL=postgresql://DB_USER:DB_PASSWORD@HOST:PORT/DB_NAME
+# eg: dev: DATABASE_URL=postgresql://DB_USER:DB_PASSWORD@dev-db:5432/DB_NAME
+# eg: prod: DATABASE_URL=postgresql://DB_USER:DB_PASSWORD@prod-db:5432/DB_NAME
 # Redis
 REDIS_URL=redis://HOST:PORT
+# eg: dev: REDIS_URL=redis://dev-redis:6379
+# eg: prod: REDIS_URL=redis://prod-redis:6379
+# JWT
 # Time values accept: ms | s | m | h | d | w | y | (plain number = ms)
-# JWT - Access
 JWT_ACCESS_SECRET_KEY=CHANGE_ME
 JWT_ACCESS_EXPIRES_IN=1h
-# JWT - Refresh
 JWT_REFRESH_SECRET_KEY=CHANGE_ME
 JWT_REFRESH_EXPIRES_IN=2h
 # Throttle - Rate limiting