nodejs postgres connection

Signed-off-by: Utkarsh Mathur <utkarshmathur05@gmail.com>

nodejs-postgres/docker-compose.yml

@@ -0,0 +1,19 @@
+version: '3'
+services:
+  db:
+    build:
+      context: ./postgres
+    ports:
+      - "5432:5432"
+  app:
+    build:
+      context: ./nodejs
+    ports:
+      - "3000:3000"
+    depends_on:
+      - db
+    networks:
+      - backend
+
+networks:
+  backend:

nodejs-postgres/nodejs/Dockerfile

@@ -0,0 +1,13 @@
+FROM node:14
+
+WORKDIR /app
+
+COPY package*.json ./
+
+RUN npm install
+
+COPY . .
+
+EXPOSE 3000
+
+CMD [ "npm", "start" ]

nodejs-postgres/nodejs/index.js

@@ -0,0 +1,11 @@
+const express = require('express');
+const app = express();
+const port = 3000;
+
+app.get('/', (req, res) => {
+  res.send('Hello World!');
+});
+
+app.listen(port, () => {
+  console.log(`Example app listening at http://localhost:${port}`);
+});

nodejs-postgres/nodejs/package.json

@@ -0,0 +1,12 @@
+{
+  "name": "nodejs-express-example",
+  "version": "1.0.0",
+  "description": "A simple NodeJS app using Express",
+  "main": "index.js",
+  "scripts": {
+    "start": "node index.js"
+  },
+  "dependencies": {
+    "express": "^4.17.1"
+  }
+}

nodejs-postgres/postgres/Dockerfile

@@ -0,0 +1,5 @@
+FROM postgres:12
+
+ENV POSTGRES_DB mydb
+ENV POSTGRES_USER myuser
+ENV POSTGRES_PASSWORD mypassword