Add dashboard linting workflow (#2529)

Co-authored-by: shaunak_deshmukh <shaunak@infracloud.io>

.github/workflows/lint-dashboards.yaml

@@ -0,0 +1,34 @@
+name: Lint dashboards
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - 'charts/fission-all/dashboards/**.json'
+  pull_request:
+    branches:
+      - main
+    paths:
+      - 'charts/fission-all/dashboards/**.json'
+  workflow_dispatch:
+
+jobs:
+  lint-dashboards:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Set up Go
+        uses: actions/setup-go@v3
+        with:
+          go-version: 1.18.5
+
+      - name: Check out code
+        uses: actions/checkout@v3
+
+      - name: Install dashboard linter
+        run: |
+          go install github.com/grafana/dashboard-linter
+
+      - name: Run dashboard linter
+        run: ./hack/lint-dashboards.sh

hack/lint-dashboards.sh

@@ -0,0 +1,16 @@
+if ! command -v dashboard-linter >/dev/null 2>&1; then
+    echo "dashboard-linter is not installed"
+    exit 1;
+fi
+BASE_PATH=$(pwd)
+
+if [[ -z "$BASE_PATH" ]] ; then
+    BASE_PATH=$(GITHUB_WORKSPACE)
+fi
+
+DASHBOARD_PATH="$BASE_PATH/charts/fission-all/dashboards/*"
+
+for f in $DASHBOARD_PATH
+do
+    dashboard-linter lint --strict $f
+done