api: バージョンとデプロイコミットを返す /version エンドポイントを追加

- package.jsonのversionとビルド時注入のコミットSHA(APP_COMMIT)を返す
- CoolifyのSOURCE_COMMITをbuild argとして受けるためDockerfile/composeを更新
- authModeも含め、デプロイ状態の切り分けに使えるようにした

apps/api/src/server.ts

@@ -4,6 +4,7 @@ import Fastify, { type FastifyReply, type FastifyRequest } from "fastify";
 import cookie from "@fastify/cookie";
 import cors from "@fastify/cors";
 import { z } from "zod";
+import pkg from "../../../package.json" with { type: "json" };
 import { buildSourceDocument } from "../../../packages/core/src/index";
 import type { Identity } from "../../../packages/core/src/index";
 import { loadConfig } from "./config";
@@ -85,6 +86,13 @@ export async function createServer() {
   await registerAuthRoutes(app, appConfig);
 
   app.get("/healthz", async () => ({ ok: true, service: "altdock-api", storageMode: appConfig.STORAGE_MODE }));
+  app.get("/version", async () => ({
+    name: "altdock-api",
+    version: pkg.version,
+    commit: process.env.APP_COMMIT || process.env.SOURCE_COMMIT || "unknown",
+    authMode: appConfig.AUTH_MODE,
+    node: process.version,
+  }));
 
   app.get("/api/v1/me", async (request, reply) => {
     const identity = await requireIdentity(request, reply, appConfig);