rename "push" to "webPush" for future-proofing

src/db/index.ts

@@ -47,6 +47,6 @@ db.on("populate", () => {
     apiServer: AppString.DEFAULT_ENDORSER_API_SERVER,
 
     // remember that things you add from now on aren't automatically in the DB for old users
-    pushServer: AppString.DEFAULT_PUSH_SERVER,
+    webPushServer: AppString.DEFAULT_PUSH_SERVER,
   });
 });