ci: add github actions testing This is easier than any other means of testing nested workspaces

diff --git a/.bazelversion b/.bazelversion
index 0062ac9..f3b5af3 100644
--- a/.bazelversion
+++ b/.bazelversion

@@ -1 +1 @@
-5.0.0
+6.1.1

diff --git a/.github/workflows/ci.bazelrc b/.github/workflows/ci.bazelrc
new file mode 100644
index 0000000..a21ece4
--- /dev/null
+++ b/.github/workflows/ci.bazelrc

@@ -0,0 +1,13 @@
+# This file contains Bazel settings to apply on CI only.
+# It is referenced with a --bazelrc option in the call to bazel in ci.yaml
+
+# Debug where options came from
+build --announce_rc
+# This directory is configured in GitHub actions to be persisted between runs.
+build --disk_cache=~/.cache/bazel
+build --repository_cache=~/.cache/bazel-repo
+# Don't rely on test logs being easily accessible from the test runner,
+# though it makes the log noisier.
+test --test_output=errors
+# Allows tests to run bazelisk-in-bazel, since this is the cache folder used
+test --test_env=XDG_CACHE_HOME

diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
new file mode 100644
index 0000000..d3ab560
--- /dev/null
+++ b/.github/workflows/ci.yaml

@@ -0,0 +1,22 @@
+name: CI
+
+# Controls when the action will run.
+on:
+  # Triggers the workflow on push or pull request events but only for the main branch
+  push:
+    branches: [main, 6.x]
+  pull_request:
+    branches: [main, 6.x]
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+concurrency:
+  # Cancel previous actions from the same PR: https://stackoverflow.com/a/72408109
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  test:
+    uses: bazel-contrib/.github/.github/workflows/bazel.yaml@v1
+    with:
+      folders: '["e2e/smoke"]'

diff --git a/e2e/smoke/.bazelrc b/e2e/smoke/.bazelrc
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/e2e/smoke/.bazelrc