feat: add gha linting workflows

.github/workflows/lint-docker.yaml

@@ -0,0 +1,22 @@
+---
+name: Linting - Dockerfile
+on:
+  pull_request:
+    branches: [main]
+    paths:
+      - "**Dockerfile"
+      - "**Dockerfile*"
+
+jobs:
+  hadolint:
+    name: hadolint
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@8e5e7e5ab8b370d6c329ec480221332ada57f0ab # v3.5.2
+
+      - name: Run hadolint
+        uses: reviewdog/[email protected]
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          reporter: github-pr-review

.github/workflows/lint-yaml.yaml

@@ -0,0 +1,22 @@
+---
+name: Linting - YAML
+on:
+  pull_request:
+    branches: [main]
+    paths:
+      - "**.yml"
+      - "**.yaml"
+
+jobs:
+  yamllint:
+    name: yamllint
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@8e5e7e5ab8b370d6c329ec480221332ada57f0ab # v3.5.2
+
+      - name: Run yamllint
+        uses: reviewdog/[email protected]
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          reporter: github-pr-review

.github/workflows/stale.yaml

@@ -0,0 +1,28 @@
+# This workflow warns and then closes issues and PRs that have had no activity for a specified amount of time.
+#
+# You can adjust the behavior by modifying this file.
+# For more information, see:
+# https://github.com/actions/stale
+---
+name: Mark stale issues and pull requests
+
+on:
+  schedule:
+    - cron: '22 16 * * *'
+
+jobs:
+  stale:
+
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
+
+    steps:
+      - uses: actions/stale@v3
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          stale-issue-message: 'Stale issue message'
+          stale-pr-message: 'Stale pull request message'
+          stale-issue-label: 'no-issue-activity'
+          stale-pr-label: 'no-pr-activity'