fix: use github actions artifact to provide frontend e2e to cypress containers

something in our CI setup lets turbo believe that the environment has
changed so much that the build can't be restored from the cache.
Therefore all the cypress jobs are rebuilding the frontend on their own.
It probably has something to do with the fact that the cypress jobs are not
running with the ubuntu image but with the cypress docker image.
I couldn't find out how to fix this, so I changed the CI to use a GitHub
actions artifact.

Signed-off-by: Tilman Vatteroth <git@tilmanvatteroth.de>

.github/workflows/e2e-tests.yml

@@ -132,10 +132,21 @@ jobs:
         run: yarn turbo run build:test --filter=frontend
         shell: bash
         env:
+          NODEJS_VERSION: ${{ env.NODEJS_VERSION }}
           TURBO_TOKEN: ${{ secrets.TURBO_TOKEN }}
           TURBO_API: ${{ vars.TURBO_API }}
           TURBO_TEAM: ${{ vars.TURBO_TEAM }}
 
+      - name: Compress build
+        run: tar --exclude='frontend/.next/cache' --exclude='frontend/.next/standalone' --zstd -cf frontend-e2e-build.tar.zst frontend/.next/
+
+      - name: Upload build artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: frontend-e2e-build
+          retention-days: 1
+          path: frontend-e2e-build.tar.zst
+
   frontend-cypress:
     if: "(github.event_name == 'pull_request_target') == github.event.pull_request.head.repo.fork"
     needs: frontend-build
@@ -148,25 +159,26 @@ jobs:
       matrix:
         containers: [ 1, 2, 3 ]
     steps:
+      - name: Install jq and zstd
+        run: apt-get update && apt-get install -y jq zstd
+
       - name: Check out repo
         uses: actions/checkout@8e5e7e5ab8b370d6c329ec480221332ada57f0ab # v3.5.2
+        with:
+          ref: ${{ env.HEAD_COMMIT_HASH }}
 
       - name: Setup node
         uses: ./.github/actions/setup-node
         with:
           NODEJS_VERSION: ${{ env.NODEJS_VERSION }}
 
-      - name: Install jq
-        run: apt-get update && apt-get install -y jq
+      - name: Download build
+        uses: actions/download-artifact@v3
+        with:
+          name: frontend-e2e-build
 
-      - name: Build test production build
-        run: yarn turbo run build:test --filter=frontend
-        shell: bash
-        env:
-          NODEJS_VERSION: ${{ env.NODEJS_VERSION }}
-          TURBO_TOKEN: ${{ secrets.TURBO_TOKEN }}
-          TURBO_API: ${{ vars.TURBO_API }}
-          TURBO_TEAM: ${{ vars.TURBO_TEAM }}
+      - name: Decompress build
+        run: tar -xf frontend-e2e-build.tar.zst
 
       - name: Run server
         working-directory: frontend/
@@ -181,7 +193,6 @@ jobs:
         run: yarn turbo run test:e2e:ci --filter=frontend
         shell: bash
         env:
-          NODEJS_VERSION: ${{ env.NODEJS_VERSION }}
           CYPRESS_RECORD_KEY: ${{ secrets.CYPRESS_RECORD_KEY }}
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           TURBO_TOKEN: ${{ secrets.TURBO_TOKEN }}