Remove config files in favor of environment variables

Server/utilities/mysqlHandler.js

@@ -1,15 +1,15 @@
+require('dotenv').config();
 const mysql = require('mysql');
-const databaseConfig = require('../config/databaseConfig');
 const utils = require('./utils');
-
+ 
 const connection = mysql.createPool({
-    host: databaseConfig.database_host,
-    user: databaseConfig.database_user,
-    password: databaseConfig.database_password,
-    database: databaseConfig.database_database
+    host: process.env.NODE_DB_HOST,
+    user: process.env.NODE_DB_USER,
+    password: process.env.NODE_DB_PASS,
+    database: process.env.NODE_DB_NAME
 });
 
-const nodesTable = `${databaseConfig.database_database}.nodes`;
+const nodesTable = `${process.env.NODE_DB_NAME}.nodes`;
 
 /** Get all nodes the server knows about regardless of status
  * @param {*} callback Callback function