add github workflow

.github/workflows/relative-ci.yaml

@@ -0,0 +1,17 @@
+name: RelativeCI
+
+on:
+  workflow_run:
+    workflows: ["Run tests"]
+    types:
+      - completed
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Send bundle stats and build information to RelativeCI
+        uses: relative-ci/agent-action@v2
+        with:
+          key: ${{ secrets.RELATIVE_CI_KEY }}
+          token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/tests.yml

@@ -99,6 +99,13 @@ jobs:
 
       - name: "Next.js: Build"
         run: yarn workspace @integration-test/nextjs run build
+      # Upload webpack-stats.json to use on relative-ci.yaml workflow
+      - name: Upload webpack stats artifact
+        if: matrix.version == 'latest'
+        uses: relative-ci/agent-upload-artifact-action@v1
+        with:
+          webpackStatsFile: ./integration-test/nextjs/webpack-stats.json
+
       - name: "Next.js: Test"
         run: yarn workspace @integration-test/nextjs run test | tee $GITHUB_STEP_SUMMARY; exit ${PIPESTATUS[0]}