add docker-ci

Author: sp-yduck

.github/workflows/cover.yaml

@@ -1,3 +1,5 @@
+name: unit test coverage
+
 # add public code coverage reports
 on:
   push:

.github/workflows/docker-ci.yml

@@ -0,0 +1,26 @@
+name: docker build
+
+on:
+  push:
+    branches:
+    - main
+
+env:
+  REGISTRY: docker.io
+  IMAGE_NAME: spyduck/cluster-api-provider-proxmox
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@f4ef78c080cd8ba55a85445d5b36e214a81df20a
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+      
+      - name: Build and push Docker image
+        run: "make docker-build docker-push IMG=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${ GITHUB_SHA::7 }"

.github/workflows/docker-publish.yml

@@ -1,4 +1,4 @@
-name: Docker
+name: publish container image
 
 # This workflow uses actions that are not certified by GitHub.
 # They are provided by a third-party and are governed by