Update Dockerfile

Dockerfile

@@ -1,30 +1,17 @@
 # =========================
-# Stage 1: Build Frontend
+# 1) Web build stage
 # =========================
 FROM node:20-slim AS web_builder
-
 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/package*.json ./
+RUN npm install
 COPY web/ ./
-RUN npm run build
-
+RUN npm run build   # -> outputs /web/build (per your log)
 
 # =========================
-# Stage 2: Python Runtime
+# 2) API runtime stage
 # =========================
-FROM python:3.11-slim AS runtime
-
-ENV PYTHONDONTWRITEBYTECODE=1 \
-    PYTHONUNBUFFERED=1 \
-    PORT=7860
+FROM python:3.11-slim
 
 WORKDIR /app
 
@@ -32,14 +19,13 @@ WORKDIR /app
 COPY requirements.txt /app/requirements.txt
 RUN pip install --no-cache-dir -r /app/requirements.txt
 
-# ---- Copy backend ----
+# ---- Copy API source ----
 COPY api/ /app/api/
 
-# ---- 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
+# ---- Copy built web assets ----
+COPY --from=web_builder /web/build /app/web/build
 
-# ---- Run API (serves web dist too) ----
+# ---- Run API (serves web build too) ----
+ENV PORT=7860
 EXPOSE 7860
 CMD ["uvicorn", "api.server:app", "--host", "0.0.0.0", "--port", "7860"]