Update mysql module and Create rest api

+host=dataserver.chilwi8knzrl.us-east-1.rds.amazonaws.com
+user=admin
+password=apple0606!
+port=3306
+database=csvdata 

@@ -2,5 +2,3 @@ node_modules/
 
 
 package-lock.json
 package-lock.json
 
 
-#database
-database.json
\ No newline at end of file

+const express =require('express');
+const mysql = require('mysql');
+const app = express();
+const dotenv = require('dotenv').config();   //dotenv를 사용하기 위해서 dotenv 라이브러리를 불러온 뒤, config() 메소드를 호출
+const mysqlConObj = require('./config/mysql');   //config의 mysql파일을 가져와 mysqlConnection 객체 사용
+const db = mysqlConObj.init();
+
+mysqlConObj.open(db);   //db 연결
+
+
+
+

+const mysql = require('mysql'); // mysql 드라이버 불러오기 
+
+const mysqlConnection = {
+    init: function() {              //DB와 연결하는 객체 생성
+        return mysql.createConnection({
+            host: process.env.host,
+            user: process.env.user,
+            password: process.env.password,
+            port:process.env.port,
+            database:process.env.database 
+        });
+    },
+    open: function(con) {       //생성된 객체를 DB와 연결
+        con.connect(err => {
+            if(err){
+                console.log("MySQL 연결 실패 : ",err);
+            } else{
+                console.log("MySQL 연결 성공");
+            }
+        });
+    },
+    close: function(con){       //DB와 연결을 종료
+        con.end(err => {
+            if(err){
+                console.log("MySQL 종료 실패 : ", err);
+            } else {
+                console.log("MySQL Terminated...");
+            }
+        })
+    }
+}
+
+module.exports = mysqlConnection;   //생성한 mysqlConnection 객체를 모듈화하여 외부 파일에서 불러와 사용할 수 있도록 export함
\ No newline at end of file

@@ -9,6 +9,7 @@
   "author": "",
   "author": "",
   "license": "ISC",
   "license": "ISC",
   "dependencies": {
   "dependencies": {
+    "dotenv": "^10.0.0",
     "express": "^4.17.1",
     "express": "^4.17.1",
     "mysql": "^2.18.1",
     "mysql": "^2.18.1",
     "path": "^0.12.7",
     "path": "^0.12.7",

@@ -4,38 +4,18 @@ const path = require("path");
 const HTTPS = require("https");
 const HTTPS = require("https");
 
 
 const app = express();
 const app = express();
-const domain = "2020105619.oss2021.tk";
+const domain = "2020105635.oss2021.tk";
 const sslport = 8080;
 const sslport = 8080;
 
 
-const data = fs.readFileSync('database.json');
-const conf = JSON.parse(data);
-const mysql = require('mysql');
-
 app.use(express.static(path.join(__dirname, "kakao")));
 app.use(express.static(path.join(__dirname, "kakao")));
 app.use(express.static(path.join(__dirname, "public")));
 app.use(express.static(path.join(__dirname, "public")));
 
 
-const connection = mysql.createConnection({
-  host:conf.host,
-  user:conf.user,
-  password:conf.password,
-  port:conf.port,
-  database:conf.database
-});
-
-connection.connect();
-
 app.get("/", function (req, res) {
 app.get("/", function (req, res) {
   res.sendFile(path.join(__dirname + "/main.html"));
   res.sendFile(path.join(__dirname + "/main.html"));
 });
 });
 
 
 app.get("/geolocation", function (req, res) {
 app.get("/geolocation", function (req, res) {
   res.sendFile(path.join(__dirname + "/kakao/kakaomap.html"));
   res.sendFile(path.join(__dirname + "/kakao/kakaomap.html"));
-  connection.query('SELECT * FROM csvdata.csvdata', function (error, results, fields) {
-    if (error) {
-        throw(error);
-    }
-    res.send(results);
-  });
 });
 });
 
 
 try {
 try {