Use compute engine to build coverage and app engine to publish the result (project-chip#24395)

Author: yufengwangca

integrations/appengine/README.md

@@ -0,0 +1,36 @@
+## Deploy Static Website on App Engine
+
+### Setup google cloud integration
+
+Follow https://cloud.google.com/sdk/docs/install.
+
+### Build Coverage Report
+
+To check out the Matter repository:
+
+```
+git clone --recurse-submodules git@github.com:project-chip/connectedhomeip.git
+```
+
+Run the following command to build coverage report:
+
+```
+cd connectedhomeip
+./scripts/build_coverage.sh
+```
+
+After a successful build, the coverage report is located at
+`out/coverage/coverage`
+
+#### Upload your static website to Google App Engine
+
+File `integrations/appengine/webapp_config.yaml` is used to configure the
+settings of your App Engine application.
+
+Directory `out/coverage/coverage` contains the coverage report files, such as
+HTML, CSS, images, and JavaScript.
+
+```
+cd out/coverage/coverage
+gcloud app deploy ../../../integrations/appengine/webapp_config.yaml
+```

integrations/appengine/webapp_config.yaml

@@ -0,0 +1,10 @@
+runtime: python27
+api_version: 1
+threadsafe: true
+handlers:
+    - url: /
+      static_files: html/index.html
+      upload: html/index.html
+    - url: /(.*)
+      static_files: html/\1
+      upload: html/(.*)

integrations/cloudbuild/build-coverage-remote.yaml

@@ -168,5 +168,3 @@ lcov --initial --capture --directory "$OUTPUT_ROOT/obj/src" --exclude="$PWD"/zzz
 lcov --capture --directory "$OUTPUT_ROOT/obj/src" --exclude="$PWD"/zzz_generated/* --exclude="$PWD"/third_party/* --exclude=/usr/include/* --output-file "$COVERAGE_ROOT/lcov_test.info"
 lcov --add-tracefile "$COVERAGE_ROOT/lcov_base.info" --add-tracefile "$COVERAGE_ROOT/lcov_test.info" --output-file "$COVERAGE_ROOT/lcov_final.info"
 genhtml "$COVERAGE_ROOT/lcov_final.info" --output-directory "$COVERAGE_ROOT/html"
-
-tar czvf "$COVERAGE_ROOT/coverage_html.tar.gz" -C "$COVERAGE_ROOT/html" .