chore: Publish internet_identity_frontend.wasm.gz in CI (#3646)

This PR configures GitHub to publish internet_identity_frontend.wasm.gz
in CI pipelines.

Author: aterga

.github/workflows/canister-tests.yml

@@ -137,6 +137,46 @@ jobs:
           # downloaded file
           path: archive.wasm.gz
 
+  docker-build-internet_identity_frontend:
+    runs-on: ubuntu-latest
+    needs: docker-build-base
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Infer version
+        id: version
+        run: |
+          version="$(./scripts/version)"
+          echo "Inferred version: '$version'"
+          echo "version=$version" >> "$GITHUB_OUTPUT"
+
+      - name: Set up docker buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Build internet_identity_frontend.wasm.gz
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: Dockerfile
+          build-args: |
+            II_VERSION=${{ steps.version.outputs.version }}
+            II_DEV_CSP=0
+          cache-from: type=gha,scope=cached-stage
+          # Exports the artefacts from the final stage
+          outputs: ./out
+          target: scratch_internet_identity_frontend
+
+      - run: mv out/internet_identity_frontend.wasm.gz internet_identity_frontend.wasm.gz
+      - run: sha256sum internet_identity_frontend.wasm.gz
+      - name: "Upload internet_identity_frontend.wasm.gz"
+        uses: actions/upload-artifact@v4
+        with:
+          # name is the name used to display and retrieve the artifact
+          name: internet_identity_frontend.wasm.gz
+          # path is the name used as the file to upload and the name of the
+          # downloaded file
+          path: internet_identity_frontend.wasm.gz
+
   wasm-size:
     runs-on: ubuntu-latest
     needs: docker-build-ii
@@ -722,7 +762,13 @@ jobs:
   # On release tags, a new release is created and the assets are uploaded.
   release:
     runs-on: ubuntu-latest
-    needs: [docker-build-ii, docker-build-archive, vc_demo_issuer-build]
+    needs:
+      [
+        docker-build-ii,
+        docker-build-archive,
+        docker-build-internet_identity_frontend,
+        vc_demo_issuer-build,
+      ]
 
     steps:
       - uses: actions/checkout@v4
@@ -751,6 +797,12 @@ jobs:
           name: archive.wasm.gz
           path: .
 
+      - name: "Download frontend"
+        uses: actions/download-artifact@v4
+        with:
+          name: internet_identity_frontend.wasm.gz
+          path: .
+
       - name: "Download issuer"
         uses: actions/download-artifact@v4
         with:
@@ -816,6 +868,7 @@ jobs:
             internet_identity_production.wasm.gz
             internet_identity_dev.wasm.gz
             internet_identity_test.wasm.gz
+            internet_identity_frontend.wasm.gz
             archive.wasm.gz
             vc_demo_issuer.wasm.gz
           production_asset: internet_identity_production.wasm.gz
@@ -843,6 +896,7 @@ jobs:
             internet_identity_production.wasm.gz.sha256 \
             internet_identity_dev.wasm.gz \
             internet_identity_test.wasm.gz \
+            internet_identity_frontend.wasm.gz \
             src/internet_identity/internet_identity.did \
             archive.wasm.gz \
             vc_demo_issuer.wasm.gz

Dockerfile

@@ -99,8 +99,27 @@ RUN touch src/*/src/lib.rs
 RUN ./scripts/build --archive
 RUN sha256sum /archive.wasm.gz
 
+FROM deps as build_internet_identity_frontend
+
+COPY . .
+
+# The version baked in
+ARG II_VERSION=
+
+# The features, see README
+ARG II_DEV_CSP=
+
+RUN touch src/*/src/lib.rs
+RUN npm ci
+
+RUN ./scripts/build --frontend
+RUN sha256sum /internet_identity_frontend.wasm.gz
+
 FROM scratch AS scratch_internet_identity
 COPY --from=build_internet_identity /internet_identity.wasm.gz /
 
 FROM scratch AS scratch_archive
 COPY --from=build_archive /archive.wasm.gz /
+
+FROM scratch AS scratch_internet_identity_frontend
+COPY --from=build_internet_identity_frontend /internet_identity_frontend.wasm.gz /