Update Dockerfile

Dockerfile

@@ -1,10 +1,30 @@
-FROM python:3.11-slim
+# =========================
+# Stage 1: Build Frontend
+# =========================
+FROM node:20-slim AS web_builder
 
-# ---- system deps (node for Vite build) ----
-RUN apt-get update && apt-get install -y curl && rm -rf /var/lib/apt/lists/*
-RUN curl -fsSL https://deb.nodesource.com/setup_20.x | bash - \
-  && apt-get update && apt-get install -y nodejs \
-  && rm -rf /var/lib/apt/lists/*
+WORKDIR /web
+
+# 1) 先只拷贝依赖声明，最大化缓存命中
+COPY web/package.json web/package-lock.json* ./
+
+# 2) 推荐 npm ci：更稳定、更可复现；如果没有 lock 文件会自动失败
+#    如果你没有 package-lock.json，就把 npm ci 改成 npm install
+RUN if [ -f package-lock.json ]; then npm ci; else npm install; fi
+
+# 3) 再拷贝其余前端代码并构建
+COPY web/ ./
+RUN npm run build
+
+
+# =========================
+# Stage 2: Python Runtime
+# =========================
+FROM python:3.11-slim AS runtime
+
+ENV PYTHONDONTWRITEBYTECODE=1 \
+    PYTHONUNBUFFERED=1 \
+    PORT=7860
 
 WORKDIR /app
 
@@ -12,16 +32,14 @@ WORKDIR /app
 COPY requirements.txt /app/requirements.txt
 RUN pip install --no-cache-dir -r /app/requirements.txt
 
-# ---- Copy source ----
+# ---- Copy backend ----
 COPY api/ /app/api/
-COPY web/ /app/web/
 
-# ---- Build React ----
-WORKDIR /app/web
-RUN npm install
-RUN npm run build
+# ---- Copy built frontend dist from Stage 1 ----
+# server.py expects WEB_DIST = ../web/dist relative to /app/api
+# so we must place it at /app/web/dist
+COPY --from=web_builder /web/dist /app/web/dist
 
 # ---- Run API (serves web dist too) ----
-WORKDIR /app
-ENV PORT=7860
+EXPOSE 7860
 CMD ["uvicorn", "api.server:app", "--host", "0.0.0.0", "--port", "7860"]