cloud-formation-simple-node-app.yaml

Resources:
  NodeSecurityGroup: 
    Type: "AWS::EC2::SecurityGroup"
    Properties: 
      GroupDescription: Enable HTTP access via port 3000
      SecurityGroupIngress: 
        - 
          IpProtocol: tcp
          FromPort: 3000
          ToPort: 3000
          CidrIp: 0.0.0.0/0
  MyFirstCloudFormationInstance:
    Type: AWS::EC2::Instance
    Properties:
      AvailabilityZone: us-east-1a
      ImageId: ami-a4c7edb2
      SecurityGroups:
        - !Ref NodeSecurityGroup
      InstanceType: t2.micro
      UserData:
        Fn::Base64: !Sub |
          #!/bin/bash
          curl -sL https://rpm.nodesource.com/setup_10.x | bash -
          yum update -y
          yum install -y nodejs
          mkdir node
          chmod 777 node
          cd node
          touch index.js
          chmod 777 index.js
          echo "const http = require('http');const server=http.createServer(function(request, response){response.setHeader('Content-Type', 'application/json'); response.end(JSON.stringify({message: 'Hello World', date: new Date(), host: '$(hostname -f)' }));});server.listen(3000);console.log('Server is listening on post 3000');" > index.js
          node index.js