refactor: use mysql

.gitignore

@@ -1,2 +1,3 @@
 
-test.db
+test.db
+.env

dotenv.sample

@@ -0,0 +1,5 @@
+hostname=localhost
+username=username
+db=dbname
+poolSize=3
+password=password

src/infrastructure/SqlConnection.ts

@@ -1,14 +1,14 @@
-import { DB } from "https://deno.land/x/[email protected]/mod.ts";
+import { config } from "https://deno.land/x/dotenv/mod.ts";
+import { Client } from "https://deno.land/x/mysql/mod.ts";
 import { IDbConnection } from "../interfaces/database/IDbConnection.ts";
 
-const db = new DB("test.db");
+const client = await new Client().connect(config())
 
 // SQLとの接続部分
 export class SqlConnection implements IDbConnection {
   // 与えられたSQLクエリを実行する
   async execute(query: string, args: any[]) {
-    const result = db.query(query, args);
-    // db.close();
+    const result = client.query(query, args);
     return result;
   }
 }