Migrate to shared GitHub Actions workflow

Migrates to a new, shared GitHub Actions workflow template provided by the BerkeleyLibrary/.github repository. This does essentially what we have always done, but pulls the workflow configuration from the central repository. The CI process is as follows:

- Build: The Docker image is built, tagged (branch, SHA, and tag), and pushed to ghcr.io/berkeleylibrary/geodata.
- Test: The built image is tested using `docker compose`.

The test stage depends on the consuming repository having implemented `bin/test`, `bin/setup`, and `docker-compose(.ci)?.yml` files. For more information on that, see the accompanying files in this commit or the forthcoming documentation in the shared workflows repo.

.dockerignore

@@ -0,0 +1,81 @@
+*.rbc
+capybara-*.html
+.bash*
+.rspec
+/db/*.sqlite3
+/db/*.sqlite3-journal
+/db/*.sqlite3-[0-9]*
+/public/system
+/coverage/
+/spec/tmp
+*.orig
+rerun.txt
+pickle-email-*.html
+
+# Ignore all logfiles and tempfiles.
+/log/*
+/tmp/*
+!/log/.keep
+!/tmp/.keep
+
+# TODO Comment out this rule if you are OK with secrets being uploaded to the repo
+config/initializers/secret_token.rb
+config/master.key
+
+# Only include if you have production secrets in this file, which is no longer a Rails default
+# config/secrets.yml
+
+# dotenv
+# TODO Comment out this rule if environment variables can be committed
+.env
+
+## Environment normalization:
+/.bundle
+/vendor/bundle
+
+# these should all be checked in to normalize the environment:
+# Gemfile.lock, .ruby-version, .ruby-gemset
+
+# unless supporting rvm < 1.11.0 or doing something fancy, ignore this:
+.rvmrc
+
+# if using bower-rails ignore default bower_components path bower.json files
+/vendor/assets/bower_components
+*.bowerrc
+bower.json
+
+# Ignore pow environment settings
+.powenv
+
+# Ignore Byebug command history file.
+.byebug_history
+
+# Ignore Bash history file.
+.bash_history
+
+# Ignore node_modules
+node_modules/
+
+# Ignore precompiled javascript packs
+/public/packs
+/public/packs-test
+/public/assets
+
+# Ignore yarn files
+/yarn-error.log
+yarn-debug.log*
+.yarn-integrity
+
+# Ignore uploaded files in development
+/storage/*
+!/storage/.keep
+
+# Build/test artifacts
+/artifacts/
+
+# Ignore solr files
+solr/*/data/*
+
+.irb_history
+
+.github

.github/workflows/docker-ci.yml

@@ -0,0 +1,38 @@
+name: Docker CI
+
+on:
+  push:
+  release:
+  workflow_dispatch:
+
+jobs:
+  prereqs:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Check for required files
+        run: |
+          errors=0
+
+          required_files=(bin/setup bin/test docker-compose.yml docker-compose.ci.yml)
+          for file in "${required_files[@]}"; do
+            if [ -f "$file" ]; then
+              echo "$file found"
+            else
+              echo "$file not found"
+              errors=$((errors + 1))
+            fi
+          done
+
+          exit $errors
+
+  build:
+    needs: prereqs
+    uses: BerkeleyLibrary/.github/.github/workflows/docker-build.yml@main
+
+  test:
+    needs: build
+    uses: BerkeleyLibrary/.github/.github/workflows/docker-test.yml@main

Dockerfile

@@ -21,14 +21,14 @@ RUN mkdir -p /opt/app \
     && chown -R $APP_USER:$APP_USER /opt/app /usr/local/bundle
 
 # Get list of available packages
-RUN apt-get update -qq 
+RUN apt-get update -qq
 
 # Install standard packages from the Debian repository
 RUN apt-get install -y --no-install-recommends \
      bash \
      curl \
      default-jre \
-     ca-certificates \    
+     ca-certificates \
      nodejs \
      libpq-dev \
      libvips42 \
@@ -42,7 +42,7 @@ USER geodata
 WORKDIR /opt/app
 
 # Add binstubs to the path.
-ENV PATH "/opt/app/bin:$PATH"
+ENV PATH="/opt/app/bin:$PATH"
 
 
 # If run with no other arguments, the image will start the rails server by
@@ -106,14 +106,14 @@ RUN rails assets:precompile assets:clean log:clear tmp:clear
 ARG BUILD_TIMESTAMP
 ARG BUILD_URL
 ARG DOCKER_TAG
-ARG GIT_BRANCH
-ARG GIT_COMMIT
-ARG GIT_URL
+ARG GIT_REF_NAME
+ARG GIT_SHA
+ARG GIT_REPOSITORY_URL
 
 # build arguments aren't persisted in the image, but ENV values are
 ENV BUILD_TIMESTAMP="${BUILD_TIMESTAMP}"
 ENV BUILD_URL="${BUILD_URL}"
 ENV DOCKER_TAG="${DOCKER_TAG}"
-ENV GIT_BRANCH="${GIT_BRANCH}"
-ENV GIT_COMMIT="${GIT_COMMIT}"
-ENV GIT_URL="${GIT_URL}"
+ENV GIT_REF_NAME="${GIT_REF_NAME}"
+ENV GIT_SHA="${GIT_SHA}"
+ENV GIT_REPOSITORY_URL="${GIT_REPOSITORY_URL}"