update database

.env.example

@@ -5,6 +5,9 @@ DB_USERNAME=
 DB_PASSWORD=
 DB_NAME=
 
+# CapRover production example:
+# DB_HOST=srv-captain--growdb
+
 # SMS
 SMS_API_KEY=
 SMS_SENDER=
@@ -24,5 +27,8 @@ JWT_REFRESH_SECRET=
 JWT_REFRESH_EXPIRES_IN=7d
 
 # App
-PORT=3000
+PORT=4000
 NODE_ENV=development
+
+# CORS (comma-separated origins, e.g. https://app.example.com)
+# CORS_ORIGIN=