fixed bug

.env.example

@@ -1,11 +1,21 @@
-#app
+# app
 PORT=3023
 
-#database
-POSTGRES_HOST="localhost"
+# database
+DB_HOST=localhost
+DB_PORT=5432
+DB_USERNAME=postgres
+DB_PASSWORD=postgres
+DB_DATABASE=mydb
+
+POSTGRES_HOST=db
 POSTGRES_PORT=5432
-POSTGRES_USER="postgres"
-POSTGRES_PASSWORD=""
-POSTGRES_DATABASE="notification_db"
-POSTGRES_SSL=false
-POSTGRES_SYNC=true
+POSTGRES_USER=postgres
+POSTGRES_PASSWORD=postgres
+POSTGRES_DB=mydb
+
+DB_SSL=false
+DB_SYNC=true
+
+REDIS_HOST=redis
+REDIS_PORT=6379