Update db.js

config/db.js

@@ -2,10 +2,11 @@ const mysql = require("mysql2");
 require("dotenv").config();
 
 const db = mysql.createConnection({
-  host: "localhost",
-  user: "root",
-  password: "",
-  database: "repair_system",
+  host: process.env.DB_HOST || "localhost",
+  user: process.env.DB_USER || "root",
+  password: process.env.DB_PASS || "",
+  database: process.env.DB_NAME || "repair_system",
+  port: process.env.DB_PORT || 3306,
 });
 
 db.connect((err) => {