Fix bad initial JSON in server/storage/accounts.ts

Change-Id: I6ac54e716b9d3df31c23926b6c9c6a9d063f37cf
diff --git a/server/src/storage/accounts.ts b/server/src/storage/accounts.ts
index efcd014..1d3df05 100644
--- a/server/src/storage/accounts.ts
+++ b/server/src/storage/accounts.ts
@@ -36,7 +36,7 @@
     try {
       buffer = readFileSync(this.filename);
     } catch (e) {
-      buffer = Buffer.from('{"local":{}},"jams":{}}}');
+      buffer = Buffer.from('{"local":{},"jams":{}}');
     }
 
     this.accounts = JSON.parse(buffer.toString());