add a ci step to build the docker image

Author: jordanstephens

.github/workflows/build.yaml

@@ -0,0 +1,26 @@
+name: Build
+on:
+  push:
+    branches:
+      - '**'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+
+    steps:
+      - name: Install Docker Buildx
+        uses: docker/setup-buildx-action@v2
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+
+      - name: Build Docker image
+        working-directory: ./app
+        run: |
+          docker buildx build \
+            --platform linux/amd64,linux/arm64 \
+            .