Set up code linting

.github/dependabot.yml

@@ -1,5 +1,29 @@
 version: 2
 updates:
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: daily
+    ignore:
+      - dependency-name: '*'
+        update-types:
+          - version-update:semver-minor
+          - version-update:semver-patch
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: monthly
+    groups:
+      all:
+        patterns:
+          - '*'
+    ignore:
+      - dependency-name: '*'
+        update-types:
+          - version-update:semver-major
+    # Makes it possible to have another config. for the same dir.
+    # https://github.com/dependabot/dependabot-core/issues/1778#issuecomment-1988140219
+    target-branch: master
   - package-ecosystem: pip
     directory: /bookmarkmgr
     schedule:

.github/workflows/ci.yml

@@ -0,0 +1,17 @@
+name: CI
+on: push
+permissions: { }
+jobs:
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      statuses: write
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - uses: super-linter/super-linter/[email protected]
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}