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Repo of the Day

cyclic-software/express-hello-world

Published: Aug 26, 2022

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A starter for a simple express app with static html serving and api backend. There are several starters in different flavors that might be worth checking out.

Summary

The cyclic-software/express-hello-world repository is a minimal Express.js starter designed to provide a faster start deploying on the Cyclic platform. It packages static file hosting, a logging middleware, and a catch-all handler that echoes request information back to the caller. The project is written in JavaScript, tagged as a cyclic-sample, and is licensed under MIT.

What it is useful for

This starter is useful when an engineer wants a small, runnable Express.js baseline to try out the Cyclic deployment workflow without writing boilerplate from scratch. The catch-all handler doubles as an inspection tool during development, because it reflects request details for any path the engineer hits, such as /some/path?q=query+one or /cmd/line-curl. Static file hosting is included, so the same app can serve assets alongside the echo endpoint. Because it is published as a cyclic-sample, it also works as a reference for the runtime contract Cyclic expects from a Node.js app.

How engineers can use it

The README documents a local quick start. After cloning the repository, the engineer runs npm install to install dependencies, then npm serve to start the server locally. The README shows two ways to exercise the app:

  • Browser: visit http://localhost:3000/some/path?q=query+one&q=second+query&single=value
  • Command line: curl -i -XGET "http://localhost:3000/cmd/line-curl"

For deployment, the README points to the Cyclic deploy button, which sets up continuous deployment on git push and provides realtime backend logs and API request monitoring.

A few documented constraints are worth noting before extending the project. Cyclic hosts the app on serverless infrastructure, so there is no guarantee of memory or file system persistence between requests. The runtime expects a Node.js entry point defined by the main field in package.json (defaulting to index.js), and that entry point must start a server bound to process.env.PORT. Any setup steps beyond what the README lists are not documented here, so engineers should refer back to the README for additional configuration details.