Clean and update

db.js:
+add all process.env var in db connection.

overlaysNpc.js:
+add id options in marker.

server/db.js

@@ -2,10 +2,10 @@ const mysql = require("mysql2");
 const utilsMath = require("./utils/utilsMath.js");
 
 const dbConfig = {
-  host: "localhost",
+  host: process.env.DB_HOST,
   user: process.env.DB_USER,
   password: process.env.DB_PASSWORD,
-  database: "ac2re_world",
+  database: process.env.DB_DATABASE,
 };
 
 const con = mysql.createConnection(dbConfig);