How do I deploy a Docker application?

How do I deploy a Docker application?

To deploy a Docker application, you need to create a Dockerfile, build your image, and then run it using Docker commands.

What is a Dockerfile?

A Dockerfile is a text document that contains all the commands to assemble an image. It defines the environment and application dependencies.

Can you give me an example of a simple Dockerfile?

Sure! Here's a simple Dockerfile for a Node.js application:

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

This sets up a Node.js environment and runs your app.

How do I run the Docker container after building the image?

You can run the Docker container using the command docker run -p 3000:3000 your-image-name, replacing your-image-name with the name of your built image.