feat: Docker deploy serving SPA and API on :8080

Co-authored-by: Cursor <cursoragent@cursor.com>

Dockerfile

@@ -0,0 +1,24 @@
+# Stage 1 — build Vue SPA
+FROM node:20 AS frontend-build
+WORKDIR /frontend
+COPY frontend/package.json frontend/package-lock.json ./
+RUN npm ci
+COPY frontend/ ./
+RUN npm run build
+
+# Stage 2 — FastAPI + built SPA
+FROM python:3.12-slim
+WORKDIR /app
+
+ENV DATA_DIR=/data \
+    PYTHONDONTWRITEBYTECODE=1 \
+    PYTHONUNBUFFERED=1
+
+COPY backend/requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY backend/app ./app
+COPY --from=frontend-build /frontend/dist ./frontend/dist
+
+EXPOSE 8080
+CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8080"]