Add pre-req for dockerizing app

.gitea/workflows/build_image.yaml

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+name: ci
+
+on:
+  push:
+    branches:
+      - 'release'
+
+jobs:
+  docker:
+    runs-on: ubuntu-22.04
+    steps:
+      #-
+      #  name: Set up QEMU
+      #  uses: docker/setup-qemu-action@v3
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      -
+        name: Login to Docker Hub
+        uses: SeptBlast/docker-login@v1.1.2
+        with:
+          login-server: harbor.fisherhome.xyz
+          username: ${{ secrets.HARBOR_USERNAME }}
+          password: ${{ secrets.HARBOR_PASSWORD }}
+
+      - uses: actions/checkout@v3
+      - name: Build and push
+        run: |
+          docker login --username ${{ secrets.HARBOR_USERNAME }} --password ${{ secrets.HARBOR_PASSWORD }} harbor.fisherhome.xyz
+          docker build --no-cache ./ -t harbor.fisherhome.xyz/library/tooloftheweek-frontend:latest
+          docker push harbor.fisherhome.xyz/library/tooloftheweek-frontend:latest

Dockerfile

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+FROM 3.12.6-alpine
+
+COPY . /app
+
+CMD [flask run]