Containerized the application.

Dockerfile

@@ -0,0 +1,13 @@
+FROM node:12
+WORKDIR /usr/src/app
+COPY package*.json ./
+RUN npm install
+COPY . .
+EXPOSE 8080
+
+ADD https://github.com/ufoscout/docker-compose-wait/releases/download/2.2.1/wait /wait
+RUN chmod +x /wait
+
+## Launch the wait tool and then your application
+CMD /wait && npm start
+# CMD [ "node", "server"]

app/config/db.config.js

@@ -1,7 +1,8 @@
 module.exports = {
-  HOST: "localhost",
+  HOST: "db",
   USER: "postgres",
-  PASSWORD: "123",
+  PASSWORD: "postgres",
+  PORT: "5432",
   DB: "testdb",
   dialect: "postgres",
   pool: {

app/models/index.js

@@ -4,7 +4,7 @@ const Sequelize = require("sequelize");
 const sequelize = new Sequelize(dbConfig.DB, dbConfig.USER, dbConfig.PASSWORD, {
   host: dbConfig.HOST,
   dialect: dbConfig.dialect,
-
+  port: dbConfig.PORT,
   pool: {
     max: dbConfig.pool.max,
     min: dbConfig.pool.min,

docker-compose.yml

@@ -0,0 +1,28 @@
+version: "3.7"
+services:
+  node_backend:
+    container_name: "node_backend"
+    build: .
+    environment:
+      WAIT_HOSTS: db:5432
+    ports:
+      - "8080:8080"
+    depends_on:
+      - db
+
+  db:
+    image: "postgres:12"
+    container_name: "postgres"
+    ports:
+      - "5432:5432"
+    environment: 
+      - POSTGRES_USER=postgres
+      - POSTGRES_PASSWORD=postgres
+      - POSTGRES_DB=testdb
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U postgres"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+
+

package.json

@@ -20,7 +20,7 @@
     "body-parser": "^1.19.0",
     "cors": "^2.8.5",
     "express": "^4.17.1",
-    "pg": "^7.17.1",
+    "pg": "^8.5.1",
     "pg-hstore": "^2.3.3",
     "sequelize": "^5.21.3"
   }