Node.js Hello World with Docker

Steps:

1. Clone this repository
2. Add .env file to root directory
3. Add the following to .env file:

   PORT=5000
   DB_HOST="your_host"
   DB_USER="postgres"
   DB_PASSWORD="your_password"
   DB_NAME="your_db_name"
   

4. Make sure you have docker installed.
5. Run the following command to build the image:

   docker build -t node-hello-world .
   

   This will build the image and tag it as node-hello-world.
6. Run the following command to run the image:

   docker run -d -p 5000:5000 --name node-hello-world node-hello-world
   

   This will run the image on port 5000.
7. Open http://localhost:5000 in your browser.