Add image build pipeline

.github/workflows/build-image.yaml

@@ -0,0 +1,19 @@
+---
+    name: Build docker image
+    on: [push, pull_request]
+    permissions: read-all
+    jobs:
+        docker:
+            runs-on: ubuntu-latest
+            steps:
+            - uses: actions/checkout@v4
+            - name: Set up QEMU
+              uses: docker/setup-qemu-action@v3
+            - name: Set up Docker Buildx
+              uses: docker/setup-buildx-action@v3
+            - name: Build and push
+              uses: docker/build-push-action@v5
+              with:
+                context: .
+                push: false
+                tags: netbox-operator