Just correct implementation of error handler for Express.JS and FeathersJS apps. Set ROLLBAR_TOKEN env var to send errors to Rollbar.
For FeathersJS apps:
const errorHandler = require("correct-error-handler");
// some middlewares
app.configure(errorHandler);
For Express.JS apps:
const errorHandler = require("correct-error-handler");
// some middlewares
errorHandler(app);
Or:
const errorHandler = require("correct-error-handler/basic");
const rollbar = require("correct-error-handler/rollbar");
// some middlewares
app.use(rollbar());
app.use(errorHandler());