Add action to update chart and CRDs

Signed-off-by: Tero Saarni <tero.saarni@est.tech>

Author: tsaarni

.github/workflows/update-contour-helm-chart.yaml

@@ -0,0 +1,33 @@
+name: Update Contour Helm chart
+
+on:
+  schedule:
+    - cron: '0 4 * * *' # Runs daily at 04:00 UTC
+  workflow_dispatch:
+
+permissions:
+  contents: write        # Required for git push.
+  pull-requests: write   # Required for gh pr create.
+
+env:
+  GOPROXY: https://proxy.golang.org/
+  GO_VERSION: 1.25.2
+
+jobs:
+  bump-contour-version:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/setup-go@44694675825211faa026b3c33043df3e48a5fa00 # v6.0.0
+      with:
+        go-version: ${{ env.GO_VERSION }}
+        cache: false
+
+    - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+
+    - name: update contour helm chart and create pull request
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} # Required for gh pr create.
+      run: |
+        git config user.name "github-actions[bot]"
+        git config user.email "github-actions[bot]@users.noreply.github.com"
+        ./hack/actions/update-and-create-pr.sh --real-run

go.mod

@@ -0,0 +1,34 @@
+module github.com/projectcontour/helm-charts
+
+go 1.24.0
+
+require (
+	github.com/mholt/archives v0.1.5
+	github.com/sirupsen/logrus v1.9.3
+	gopkg.in/yaml.v3 v3.0.1
+)
+
+require (
+	github.com/STARRY-S/zip v0.2.3 // indirect
+	github.com/andybalholm/brotli v1.2.0 // indirect
+	github.com/bodgit/plumbing v1.3.0 // indirect
+	github.com/bodgit/sevenzip v1.6.1 // indirect
+	github.com/bodgit/windows v1.0.1 // indirect
+	github.com/dsnet/compress v0.0.2-0.20230904184137-39efe44ab707 // indirect
+	github.com/hashicorp/golang-lru/v2 v2.0.7 // indirect
+	github.com/klauspost/compress v1.18.0 // indirect
+	github.com/klauspost/pgzip v1.2.6 // indirect
+	github.com/kr/pretty v0.3.1 // indirect
+	github.com/mikelolasagasti/xz v1.0.1 // indirect
+	github.com/minio/minlz v1.0.1 // indirect
+	github.com/nwaples/rardecode/v2 v2.2.0 // indirect
+	github.com/pierrec/lz4/v4 v4.1.22 // indirect
+	github.com/rogpeppe/go-internal v1.13.1 // indirect
+	github.com/sorairolake/lzip-go v0.3.8 // indirect
+	github.com/spf13/afero v1.15.0 // indirect
+	github.com/stretchr/testify v1.11.1 // indirect
+	github.com/ulikunitz/xz v0.5.15 // indirect
+	go4.org v0.0.0-20230225012048-214862532bf5 // indirect
+	golang.org/x/sys v0.35.0 // indirect
+	golang.org/x/text v0.29.0 // indirect
+)