th: everyone (doesn't) gets rspec'd in ci :3

.woodpecker.yml

@@ -14,10 +14,21 @@ clone:
       depth: 10
 
 pipeline:
-  build:
+  build-base:
     <<: *docker-step
     commands:
       - docker version
+      - docker image build -f Dockerfile --build-arg SOURCE_TAG=$CI_COMMIT_SHA . --target build-base -t $NAME:build-base
+
+  # the world is not yet ready for this step
+  # test:
+  #   <<: *docker-step
+  #   commands:
+  #     - docker run --rm -e RAILS_ENV=test -e NODE_ENV=development $NAME:build-base sh -c 'bundle config set --local without development && bundle install && rake spec'
+
+  build:
+    <<: *docker-step
+    commands:
       - docker image build -f Dockerfile --build-arg SOURCE_TAG=$CI_COMMIT_SHA . -t $NAME:latest
       - docker tag $NAME:latest $NAME:$CI_COMMIT_SHA
 

Dockerfile

@@ -3,7 +3,7 @@
 ARG NODE_VERSION="18.15-bullseye-slim"
 
 FROM ghcr.io/moritzheiber/ruby-jemalloc:3.2.1-slim as ruby
-FROM node:${NODE_VERSION} as build
+FROM node:${NODE_VERSION} as build-base
 
 COPY --link --from=ruby /opt/ruby /opt/ruby
 
@@ -45,13 +45,16 @@ RUN \
     yarn install --immutable && \
     yarn cache clean
 
-ENV RAILS_ENV="production" \
-    NODE_ENV="production"
-
 # Precompile assets
 # TODO(kouhai): we're currently patching node_modules because of emoji-mart.
 # we should integrate our own fork instead.
 COPY --link . /opt/mastodon
+
+FROM build-base AS build
+
+ENV RAILS_ENV="production" \
+    NODE_ENV="production"
+
 ENV OTP_SECRET=precompile_placeholder \
     SECRET_KEY_BASE=precompile_placeholder \
     RAKE_NO_YARN_INSTALL_HACK=1