chore: add test docker image (#559)

.github/workflows/build-and-push-test-image.yml

+name: build-and-push-test-image
+
+on:
+  push:
+    branches: [main]
+
+jobs:
+  build-and-push-release-image:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: neosmemo
+          password: ${{ secrets.DOCKER_NEOSMEMO_TOKEN }}
+
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v2
+        with:
+          install: true
+
+      - name: Build and Push
+        id: docker_build
+        uses: docker/build-push-action@v3
+        with:
+          context: ./
+          file: ./Dockerfile
+          platforms: linux/amd64
+          push: true
+          tags: neosmemo/memos:test