Creating a Docker image for a simple Node/Express server.
Fireship Youtube Video - Learn Docker in 7 Easy Steps - Full Beginner's Tutorial
Lists all running containers
docker ps
Build the image:
docker build -t 8ctopotamus/docker-express-demo:1.0 .
The -t (tag) flag names the container. Give it a namespaced tag.
Show built images
docker images
Run it locally
docker run <image ID>
⚠ Important! Our image runs and our server starts listening, but if you try to make a request to the server, it fails (local:container).
We need to forward a port to our Docker container from our local machine:
docker run -p 3001:3001 <image ID>
To open a shell in the running image
docker exec
Push to DockerHub
docker login
docker push 8ctopotamus/docker-express-demo:1.0
**Locally test the Express server running on the Docker image **
docker run -p 3001:3001 <image ID>
curl --header "Content-Type: application/json" --request POST --data '{"username":"xyz","password":"xyz"}' http://localhost:3001
Create the volume
docker volume create shared-stuff
Run the container with the volume
docker run \
--mount source=shared-stuff,target=stuff
docker compose up