How can I deploy an Express.js application using Docker?

How can I deploy an Express.js application using Docker?

To deploy an Express.js app with Docker, you'll need to create a Dockerfile, build an image, and run a container.

What should I include in my Dockerfile?

Your Dockerfile should include the base image, copy your app files, install dependencies, and specify the command to run the app.

Can you give me a sample Dockerfile?

Sure! Here's a simple Dockerfile:

FROM node:14
WORKDIR /usr/src/app
COPY package*.json ./
RUN npm install
COPY . .
EXPOSE 3000
CMD ["node", "app.js"]

This sets up a Node.js environment for your Express app.

How do I build and run the Docker container?

You can build the image with docker build -t my-express-app . and run it using docker run -p 3000:3000 my-express-app.