build: doker镜像构建时记录构建时间与gitcommit

- 镜像构建时会向项目目录内的version.json写入构建时间与commit-sha，并在镜像启动时输出日志
- 添加用于获取版本号的server api

server/api/version.ts

@@ -0,0 +1,16 @@
+import { existsSync, readFileSync } from 'fs';
+import { execSync } from 'child_process';
+
+export default defineEventHandler(() => {
+  const path = process.cwd() + '/version.json';
+
+  if (existsSync(path)) {
+    return JSON.parse(readFileSync(path, 'utf-8'));
+  }
+
+  return {
+    buildTime: new Date().toISOString(),
+    gitCommit: execSync('git rev-parse --short HEAD').toString().trim(),
+    generated: true,
+  };
+});