add readme

matrix/appservice.js

@@ -0,0 +1,8 @@
+const reg = require("../matrix/read-registration")
+const AppService = require("matrix-appservice").AppService
+const as = new AppService({
+	homeserverToken: reg.hs_token
+})
+as.listen(+(new URL(reg.url).port))
+
+module.exports = as