Reverse Proxy

first-pass.ts

function handleRequest(request) {
    const firstSegment = getFirstSegmentOfPath(request);
    const destinationApp = config.apps.find((app) => firstSegment === app.path);
    if (destinationApp) {
        proxyRequestToDomain(destinationApp.domain);
        return;
    }

    proxyRequestToApp(config.defaultDomain);
}

types.ts

type App = {
  path: string;
  targetDomain: string;
};

type Config = {
  defaultDomain: string;
  apps: App[];
};