It will build

• java 8
• nodejs 8

Make the relevant changes to the docker file.

docker build .

Find the image and run it

docker images

docker run -i -t IMAGE_ID /bin/bash

Check everything is as you expect

docker container ls

Commit your contianer changes

docker commit -m "MESSAGE" CONTAINER_ID energizedwork/ci-runner:TAG_VERSION

Push your changes to docker hub

docker push energizedwork/ci-runner:TAG_VERSION

Update your .gitlab-ci.yml to use the new image

Test everything works, then commit and push your changes to the Dockerfile.

Because we're using Apline for the build runner we need to build nodejs from source. To help facilitate this we're using nvm, it means that we don't have to wait for Alpine to release a binary.

Automate the steps above! Remove the additional packages that are needed to build to help reduce the image size.