[ notes to myself ]

Build and publish to ghcr.io

1 min read

Create Dockerfile in an empty directory:

FROM alpine
CMD ["echo", "Hey vPotato!"]

Build it:

docker build . -t hey-vpotato

Run it:

; docker run hey-vpotato

Create GitHub Personal Access Token (PAT) with the write:packages scope at https://github.com/settings/tokens

Save token as environment variable:

export CR_PAT=[YOUR_TOKEN]

Use the token to sign in to the container registry:

echo $CR_PAT | docker login ghcr.io -u jbowdre --password-stdin

Edit the Dockerfile to insert a label associating it with a public GitHub repo:

LABEL org.opencontainers.image.source="https://github.com/jbowdre/hey-vpotato"
 
FROM alpine
CMD ["echo", "Hey vPotato!"]

Build the image again but this time tag it for the registry, then run it, and push it:

docker build . -t ghcr.io/jbowdre/hey-vpotato:latest
docker run ghcr.io/jbowdre/hey-vpotato:latest
docker push ghcr.io/jbowdre/hey-vpotato:latest

Go to to GH packages page at https://github.com/jbowdre/?tab=packages, click on package name, scroll to the bottom and change package visibility to Public.