Add workflow for lint, stale

.github/workflows/lint.yml

@@ -0,0 +1,54 @@
+---
+# yamllint disable rule:truthy
+name: Lint
+
+env:
+  HADOLINT_VERSION: v1.17.2
+  SHELLCHECK_OPTS: -e SC1008 -s bash
+
+on:
+  pull_request:
+    branches:
+      - main
+  push:
+    branches:
+      - main
+
+jobs:
+  hadolint:
+    runs-on: ubuntu-latest
+    name: hadolint
+    steps:
+      - name: Check out the repository
+        uses: actions/checkout@v3
+
+      - name: Run linter
+        id: changed_files
+        run: |
+          shopt -s globstar
+          for dockerfile in **/Dockerfile; do
+            echo "Linting: $dockerfile"
+            docker run --rm -i \
+              -v $(pwd)/.hadolint.yaml:/.hadolint.yaml:ro \
+              hadolint/hadolint:${{ env.HADOLINT_VERSION }} < "$dockerfile"
+          done
+
+  yamllint:
+    runs-on: ubuntu-latest
+    name: YAMLLint
+    steps:
+      - name: Check out the repository
+        uses: actions/checkout@v3
+
+      - name: Run YAMLLint
+        uses: frenck/action-yamllint@v1.3
+
+  shellcheck:
+    runs-on: ubuntu-latest
+    name: ShellCheck
+    steps:
+      - name: Check out the repository
+        uses: actions/checkout@v3
+
+      - name: Run linter
+        uses: ludeeus/action-shellcheck@1.1.0

.github/workflows/stale.yml

@@ -0,0 +1,27 @@
+---
+# yamllint disable rule:truthy
+name: Stale
+
+on:
+  schedule:
+    - cron: "0 * * * *"
+  workflow_dispatch:
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - name: 30 days stale issues
+        uses: actions/stale@v7.0.0
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          days-before-issue-stale: 30
+          days-before-issue-close: 7
+          operations-per-run: 150
+          remove-stale-when-updated: true
+          stale-issue-label: "stale"
+          exempt-issue-labels: "pinned,security,Help wanted"
+          stale-issue-message: >
+            This issue has been automatically marked as stale because it has
+            not had recent activity. It will be closed if no further activity
+            occurs. Thank you for your contributions.