Add release workflow

.github/workflows/release.yaml

@@ -0,0 +1,20 @@
+name: Releases
+
+on: 
+  push:
+    tags:
+    - 'v*'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+    - uses: actions/checkout@v2
+    - run: ./hack/merge-crds.sh
+    - uses: ncipollo/release-action@v1
+      with:
+        allowUpdates: true
+        artifacts: "dist/*"
+        body: "See https://marketplace.upbound.io/providers/grafana/provider-grafana/ for API documentation."

.gitignore

@@ -9,3 +9,6 @@ cover.out
 # ignore IDE folders
 .vscode/
 .idea/
+
+# ignore build artifacts
+dist/crds.yaml

hack/merge-crds.sh

@@ -0,0 +1,9 @@
+#! /usr/bin/env bash
+set -euox pipefail
+
+mkdir -p dist
+rm -f dist/crds.yaml
+
+for f in $(ls package/crds/*.yaml); do
+    cat "$f" >> dist/crds.yaml
+done