update: updateConfig can be missing values, selectively update db

src/apptask.js

@@ -657,8 +657,6 @@ async function update(app, args, progressCallback) {
 
     const values = {
         manifest: updateConfig.manifest,
-        appStoreId: updateConfig.appStoreId,
-        memoryLimit: updateConfig.memoryLimit,
         portBindings,
         // all domains have to be updated together
         subdomain: app.subdomain,
@@ -667,6 +665,8 @@ async function update(app, args, progressCallback) {
         secondaryDomains,
         redirectDomains: app.redirectDomains
     };
+    if ('memoryLimit' in updateConfig) values.memoryLimit = updateConfig.memoryLimit;
+    if ('appStoreId' in updateConfig) values.appStoreId = updateConfig.appStoreId;
 
     await updateApp(app, values); // switch over to the new config