chore: refactor dockerfile for prisma migration and build optimization

Refactor the Dockerfile to separate dependency installation and type
generation from the runtime environment.

Changes:
- Moved `bun prisma generate` to the build phase to ensure type definitions
  are created during image build rather than at runtime.
- Updated the ENTRYPOINT to run `bun prisma migrate deploy` before starting
  the application. This ensures database migrations are applied automatically
  upon container startup, supporting production deployments with incremental
  schema changes.
- Added missing newline at the end of the file for compliance.

This change ensures that the application handles schema updates safely in
production without requiring a separate migration step outside the container.

dockerfile

@@ -1,6 +1,15 @@
 FROM oven/bun:latest
-COPY . /app
+
 WORKDIR /app
-RUN bun install && bun prisma db push && bun prisma generate
-ENTRYPOINT [ "bun", "start"]
+COPY . .
+
+# 1. 安装依赖并生成 Prisma Client (构建阶段只需生成类型)
+RUN bun install
+RUN bun prisma generate
+
+# 暴露端口
 EXPOSE 3000
+
+# 2. 使用脚本或直接在启动时执行迁移
+# 这样每次容器启动前都会检查并应用增量更新
+ENTRYPOINT [ "sh", "-c", "bun prisma migrate deploy && bun start" ]