Rails base docker images

My own version of https://github.com/ledermann/docker-rails-base - please check that out!

The builder image contains everything necessary to install gems, node, and run browser based tests via chromium.

The production image is a stripped down version of the above.

Using the images

The images are alert to an Apkfile which can contain a list of apk packages to be installed on both the builder and production images.

Here is an example that uses these base images (convox example) and also has a dependency on 'vips' for image processing.

./Apkfile

vips

./Dockerfile

# the builder image build app gems and assets via ONBUILD triggers
# it must be named 'builder', as the production image references this in
# its build triggers.  It also installs packages listed in the Apkfile
FROM i2wdev/rails-base-builder:ruby2.7.2-rails6.0.3.4-v1 AS builder
ENV LANG=en_GB.UTF-8 LANGUAGE=en_GB.UTF-8

# convox automatically uses the image called 'development' in local dev mode
FROM builder AS development
# for convox code sync
COPY . /app
CMD ["Docker/server"]

# production build installs minimal packages, plus those listed in Apkfile
# it copies 'builder' app code and gems, and removes all non-production data 
FROM i2wdev/rails-base-production:ruby2.7.2-rails6.0.3.4-v1 
CMD ["Docker/server"]

Updating the images (notes to maintanter)

Prepare the builder image when dependencies has been changed

Prepare the builder docker image if dependencies have changed

cd builder
yarn install --check-files
bundle update
cd ..

Important: change the contents of builder/VERSION to reflect that the dependencies have changed (unless you have chnaged rails versions, in which case you might want to reset the contents of VERSION to v1)

Build, tag, and publish the docker images

./publish.sh