v0.3.1: 版本号架构重构 — VERSION为唯一真相来源

- 新增 src/version.ts: 从文件读取版本（APP_VERSION_FILE → /app/VERSION）
- main.ts 改为 import { VERSION } from './version'（不再读 package.json）
- Dockerfile 构建时 COPY VERSION 到 /app/VERSION
- 新增 build.sh: 一键读取VERSION→构建→打标签
- docker-compose.yml: 清理重复/损坏内容, 添加 pansou network-alias
- package.json version 设为 0.0.0 (不再作为真相来源)
- 清理 .env 和 compose 注释中的过期版本号

source_clean/src/main.ts

@@ -4,7 +4,7 @@ import cors from 'cors';
 import helmet from 'helmet';
 import morgan from 'morgan';
 import config from './config';
-const { version } = require('../package.json');
+import { VERSION as version } from "./version";
 import { getDb } from './database/database';
 import { connectRedis, disconnectRedis, reconnectRedis, testRedisConnection } from './middleware/cache';
 import rateLimiter from './middleware/rate-limit';

source_clean/src/version.ts

@@ -0,0 +1,27 @@
+import fs from 'fs';
+
+/**
+ * Read version from file. Order:
+ *   1. APP_VERSION_FILE env var (e.g. /data/VERSION from mounted volume)
+ *   2. /app/VERSION (built into Docker image)
+ *   3. Fallback hardcoded default
+ */
+function readVersionFromFile(): string {
+  const paths = [
+    process.env.APP_VERSION_FILE,       // from env
+    '/app/VERSION',                      // built-in fallback
+  ].filter(Boolean) as string[];
+
+  for (const p of paths) {
+    try {
+      const content = fs.readFileSync(p, 'utf-8').trim();
+      if (content) return content;
+    } catch {
+      // file doesn't exist, try next
+    }
+  }
+
+  return '0.0.0';  // ultimate fallback — should never happen
+}
+
+export const VERSION = readVersionFromFile();