Add API error handling mechanism (#14)

server/server.js

@@ -52,6 +52,10 @@ function getPermissionSets(roles) {
   return permissionSets;
 }
 
+koa.on("error", async err => {
+  throw err;
+});
+
 koa.use(
   koaJwt({
     secret: JWT_SECRET,
@@ -179,6 +183,10 @@ function exit() {
   });
 }
 
+process.on("unhandledRejection", err => {
+  throw err;
+});
+
 process.on("uncaughtException", err => {
   logger.error({
     message: "Uncaught exception",