Cleanup workflows and pin action versions (#118)

This change does some cleanup of the actions workflows to makes them
faster to run and easier to debug. It pins all of the actions workflows
to specific commit hashes. Dependabot will be enabled in a separate PR
to manage updates.

Signed-off-by: Philip Laine <philip.laine@gmail.com>

.github/workflows/release.yaml

@@ -0,0 +1,47 @@
+name: release
+on:
+  push:
+    tags:
+      - "v*"
+    branches:
+      - main
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+      id-token: write
+    steps:
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@030e881283bb7a6894de51c315a6bfe6a94e05cf #v6.0.0
+        with:
+          images: |
+            netbirdio/kubernetes-operator
+          tags: |
+            type=ref,event=pr
+            type=ref,event=branch
+            type=semver,pattern={{version}}
+      - name: Login to Docker Hub
+        uses: docker/login-action@b45d80f862d83dbcd57f89517bcf500b2ab88fb2 #v4.0.0
+        with:
+          username: ${{ secrets.DOCKER_USER }}
+          password: ${{ secrets.DOCKER_TOKEN }}
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@ce360397dd3f832beb865e1373c09c0e9f86d70a #v4.0.0
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@4d04d5d9486b7bd6fa91e7baf45bbb4f8b9deedd #v4.0.0
+      - name: Build and push
+        uses: docker/build-push-action@d08e5c354a6adb9ed34480a06d141179aa583294 #v7.0.0
+        with:
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: |
+            "org.opencontainers.image.created={{.Date}}"
+            "org.opencontainers.image.title={{.ProjectName}}"
+            "org.opencontainers.image.version={{.Version}}"
+            "org.opencontainers.image.revision={{.FullCommit}}"
+            "org.opencontainers.image.version={{.Version}}"
+            "maintainer=dev@netbird.io"