Set up build build avoidance

This commit configures the CI to run specific parts of the CI when
relevant changes has been made.

This should help us not have to deal with the integration tests when we
do doc/admin changes.

.github/workflows/test-integration.yml

@@ -3,21 +3,28 @@ name: CI
 on: [pull_request]
 
 jobs:
-  # The "build" workflow
   integration-test:
-    # The type of runner that the job will run on
     runs-on: ubuntu-latest
 
-    # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
-      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
       - uses: actions/checkout@v2
 
-      # Setup Go
+      - name: Get changed files
+        id: changed-files
+        uses: tj-actions/changed-files@v14.1
+        with:
+          files: |
+            go.*
+            **/*.go
+            integration_test/
+            config-example.yaml
+
       - name: Setup Go
+        if: steps.changed-files.outputs.any_changed == 'true'
         uses: actions/setup-go@v2
         with:
           go-version: "1.17"
 
       - name: Run Integration tests
+        if: steps.changed-files.outputs.any_changed == 'true'
         run: go test -tags integration -timeout 30m