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/lint.yml

@@ -9,7 +9,18 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
+      - name: Get changed files
+        id: changed-files
+        uses: tj-actions/changed-files@v14.1
+        with:
+          files: |
+            go.*
+            **/*.go
+            integration_test/
+            config-example.yaml
+
       - name: golangci-lint
+        if: steps.changed-files.outputs.any_changed == 'true'
         uses: golangci/golangci-lint-action@v2
         with:
           version: latest
@@ -25,6 +36,21 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
+      - name: Get changed files
+        id: changed-files
+        uses: tj-actions/changed-files@v14.1
+        with:
+          files: |
+            **/*.md
+            **/*.yml
+            **/*.yaml
+            **/*.ts
+            **/*.js
+            **/*.sass
+            **/*.css
+            **/*.scss
+            **/*.html
+
       - name: Prettify code
         uses: creyD/prettier_action@v4.0
         with: