Building and deploying a TypeScript backend Many TypeScript backends compile to JavaScript before production startup. The server must receive the generated files and runtime dependencies expected…

Deploying repeatable Node dependencies with npm ci A reviewed lock file lets deployment install the dependency tree selected for the application. npm ci is useful for a clean build because it does not…

Diagnosing an Express upload size failure An upload can fail at the proxy, request parser, upload middleware or storage layer. Identify which component rejects it before changing a size limit.…

Handling Node process restarts and graceful shutdown A production application should stop accepting new work and finish or safely hand off current work when the process manager replaces it. Abrupt…

Investigating a Node app that works locally but fails on hosting A local success can depend on files, environment values or tools that are absent on the server. Compare the release environments systematically instead…

Running Express behind a trusted reverse proxy Express can use forwarded information to understand the original client and HTTPS connection. Its trust proxy setting must reflect the network path that…

Selecting a supported Node.js runtime for an existing app Choose a Node.js version that is supported both by the application and by its dependencies. A newer version number alone does not prove a production…

Starting a Node app with the assigned production port A hosting platform may assign the internal listening port or socket used by its reverse proxy. The application must follow that integration instead of…

Storing Express sessions outside process memory A production Express session store should survive the application behavior it is expected to support. The default in-memory store is unsuitable for a…

Troubleshooting a Node native dependency build Some Node packages include native components compiled for a particular runtime and operating environment. Copying node_modules from a different machine…

Using WebSocket connections on eligible hosting WebSockets keep a connection open for two-way communication. They require support from the application server, reverse proxy and hosting process model.…