chore: add build actions

.forgejo/workflows/build-docker-image.yaml

@@ -0,0 +1,27 @@
+name: Publish image
+on:
+  push:
+  workflow_dispatch:
+
+jobs:
+  create-docker-images:
+    runs-on: host
+    steps:
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          registry: git.alecodes.page
+          username: ${{ vars.CONTAINER_REGISTRY_USER }}
+          password: ${{ secrets.CONTAINER_REGISTRY_TOKEN }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          platforms: linux/amd64,linux/arm64,linux/arm/v7
+          push: true
+          tags: |
+            git.alecodes.page/alecodes/page:latest
+            git.alecodes.page/alecodes/page:${{ github.sha }}