PostgreSQL connection setup

package.json

@@ -10,10 +10,12 @@
   "license": "ISC",
   "dependencies": {
     "cors": "^2.8.5",
+    "dotenv": "^16.4.7",
     "express": "^4.18.2",
     "express-favicon": "^2.0.4",
     "mongoose": "^7.0.1",
-    "morgan": "^1.10.0"
+    "morgan": "^1.10.0",
+    "pg": "^8.13.1"
   },
   "devDependencies": {
     "nodemon": "^2.0.21"

src/db/connect.js

@@ -0,0 +1,20 @@
+require('dotenv').config(); // Load environment variables from .env
+const {Client} = require('pg');
+
+// PostgreSQL connection using the connection string
+const client = new Client({
+    connectionString: process.env.DATABASE_URL, // Load connection string from .env
+  });
+
+
+// Connect to PostgreSQL
+const connectDB = () => {
+  client.connect().then(() => {
+    console.log('Connected to PostgreSQL database successfully!');
+  })
+  .catch(err => {
+    console.error('Error connecting to PostgreSQL database:', err.stack);
+  });
+}
+
+module.exports = connectDB

src/server.js

@@ -1,5 +1,9 @@
-const { PORT = 8000 } = process.env;
+const { PORT = 8001 } = process.env;
 const app = require("./app");
 
+const connectDB = require("./db/connect");
+
+connectDB(); // This will execute the connection string to connect to the database.
+
 const listener = () => console.log(`Listening on Port ${PORT}!`);
 app.listen(PORT, listener);