Add github action for hadolint

Author: biow0lf

.github/workflows/hadolint.yml

@@ -0,0 +1,28 @@
+name: Hadolint
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+  workflow_dispatch: {}
+  schedule:
+    - cron: "0 21 * * 6"
+
+permissions:
+  contents: read
+
+jobs:
+  run:
+    runs-on: ubuntu-24.04
+
+    steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
+        with:
+          egress-policy: audit
+
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: hadolint/hadolint-action@2332a7b74a6de0dda2e2221d575162eba76ba5e5 # v3.3.0