add heroku app.json

app.json

@@ -0,0 +1,7 @@
+{
+  "name": "proxypool",
+  "description": "自动抓取tg频道、订阅地址、公开互联网上的ss、ssr、vmess节点信息，聚合去重测试可用性后提供节点列表",
+  "repository": "https://github.com/zu1k/proxypool",
+  "logo": "https://raw.githubusercontent.com/zu1k/proxypool/master/assets/proxy.jpg",
+  "keywords": ["golang", "ss", "ssr", "vmess", "shadowsocks", "shadowsocksr"]
+}