Update Docker runtime to pull latest code on startup.

Install git in image and change start script to clone/pull target branch, reinstall dependencies, rebuild frontend, then launch backend and frontend services.

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

Dockerfile

@@ -3,24 +3,11 @@ FROM node:20-bookworm-slim
 ENV DEBIAN_FRONTEND=noninteractive
 
 RUN apt-get update \
-    && apt-get install -y --no-install-recommends python3 python3-pip ca-certificates \
+    && apt-get install -y --no-install-recommends python3 python3-pip ca-certificates git \
     && rm -rf /var/lib/apt/lists/*
 
 WORKDIR /app
 
-# Install backend dependencies.
-COPY backend/requirements.txt /app/backend/requirements.txt
-RUN python3 -m pip install --no-cache-dir -r /app/backend/requirements.txt
-
-# Install frontend dependencies and build.
-COPY frontend/package*.json /app/frontend/
-WORKDIR /app/frontend
-RUN npm install
-COPY frontend /app/frontend
-RUN npm run build
-
-# Copy backend source and runtime launcher.
-WORKDIR /app
 COPY backend /app/backend
 COPY docker/start.sh /app/docker/start.sh
 RUN chmod +x /app/docker/start.sh

README.md

@@ -58,7 +58,7 @@ npm run dev
 
 ## Docker 单容器运行
 
-项目提供了单容器运行前后端的 `Dockerfile`，容器内会同时启动：
+项目提供了单容器运行前后端的 `Dockerfile`，容器启动时会先从 Git 拉取最新代码，然后再启动：
 
 - Flask 后端：`14620`
 - 前端预览服务：`14621`
@@ -76,6 +76,14 @@ docker run --rm -it \
   -p 14620:14620 \
   -p 14621:14621 \
   --env-file backend/.env \
+  -e GIT_REPO_URL=https://git.rc707blog.top/rose_cat707/media_crawler.git \
+  -e GIT_BRANCH=main \
   media-crawler:latest
 ```
 
+可选环境变量：
+
+- `GIT_REPO_URL`：容器启动时拉取代码的仓库地址
+- `GIT_BRANCH`：拉取分支（默认 `main`）
+- `WORKTREE_DIR`：容器内代码目录（默认 `/app/runtime`）
+

docker/start.sh

@@ -1,14 +1,36 @@
 #!/usr/bin/env sh
 set -eu
 
+GIT_REPO_URL="${GIT_REPO_URL:-https://git.rc707blog.top/rose_cat707/media_crawler.git}"
+GIT_BRANCH="${GIT_BRANCH:-main}"
+WORKTREE_DIR="${WORKTREE_DIR:-/app/runtime}"
 BACKEND_PORT="${FLASK_RUN_PORT:-14620}"
 FRONTEND_PORT="${FRONTEND_PORT:-14621}"
 
-cd /app/backend
+echo "[start] syncing source from ${GIT_REPO_URL} (${GIT_BRANCH})"
+if [ ! -d "${WORKTREE_DIR}/.git" ]; then
+  rm -rf "${WORKTREE_DIR}"
+  git clone --branch "${GIT_BRANCH}" --single-branch "${GIT_REPO_URL}" "${WORKTREE_DIR}"
+else
+  git -C "${WORKTREE_DIR}" fetch origin "${GIT_BRANCH}"
+  git -C "${WORKTREE_DIR}" checkout "${GIT_BRANCH}"
+  git -C "${WORKTREE_DIR}" reset --hard "origin/${GIT_BRANCH}"
+fi
+
+echo "[start] installing backend dependencies"
+python3 -m pip install --no-cache-dir -r "${WORKTREE_DIR}/backend/requirements.txt"
+
+echo "[start] installing frontend dependencies and building"
+cd "${WORKTREE_DIR}/frontend"
+npm install
+npm run build
+
+echo "[start] launching backend:${BACKEND_PORT} and frontend:${FRONTEND_PORT}"
+cd "${WORKTREE_DIR}/backend"
 python3 app.py &
 BACKEND_PID=$!
 
-cd /app/frontend
+cd "${WORKTREE_DIR}/frontend"
 npm run preview -- --host 0.0.0.0 --port "${FRONTEND_PORT}" &
 FRONTEND_PID=$!