Node-Docker

A simple Node.js application in a Docker container.

Commands 👇

1. Build a Docker Image

To create a Docker image for this application:

docker build -t dockify/back-end .

• docker build: This command builds an image from a Dockerfile.
• -t dockify/back-end: The -t flag tags the image with a name (dockify/back-end) for easy reference.
• .: This specifies the current directory, where Docker will look for the Dockerfile.

2. List Docker Images

To see all images currently available on your system:

docker images

• This command displays a list of all Docker images along with details like Image ID, size, and creation date.

3. Run the Docker Image

To start a container from the image you built:

docker run dockify/back-end

• docker run: This command creates and starts a container from a specified image.
• dockify/back-end: Refers to the image name we created earlier.

Tip: To pass environment variables from a .env file when running the container, use:

docker run --env-file .env dockify/back-end

This loads environment variables defined in .env into the container.

4. List Running Containers

To see all containers that are currently running:

docker ps

• This command shows running containers along with details like Container ID, image, and status.

5. Stop a Running Container

To stop a container, you can use either the container name or its ID:

docker stop <container_name_or_id>

• Replace <container_name_or_id> with the actual name or ID of the container from docker ps.

6. Remove a Docker Container

After stopping a container, you can remove it with:

docker rm <container_id>

• Replace <container_id> with the ID of the container you want to remove.

7. Remove a Docker Image

To delete an image from your system:

docker rmi <image_id>

• Replace <image_id> with the ID of the image you want to delete. You can get this ID from docker images.

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Summary of Commands

Command	Description
docker build -t dockify/back-end .	Build an image from the Dockerfile
docker images	List all Docker images
docker run dockify/back-end	Run a container from the image
docker ps	List all running containers
docker stop <container_name_or_id>	Stop a running container
docker rm <container_id>	Remove a stopped container
docker rmi <image_id>	Remove a Docker image
docker run --env-file .env dockify/back-end	Run container with environment variables from .env file

This README should help you get started with Docker commands for this project!