first commit

app/db.js

@@ -0,0 +1,9 @@
+const { Pool } = require("pg");
+
+module.exports = new Pool({
+  host: process.env.DB_HOST,
+  user: process.env.DB_USER,
+  password: process.env.DB_PASSWORD,
+  database: process.env.DB_NAME,
+  port: process.env.DB_PORT
+});