Answer
Create the missing config.ts file that exports the `parseConfig()` function expected by index.ts. The function reads PORT from environment variables with a default of 3000 and returns a config object with `{ port }`. This matches the usage in index.ts which calls `config.port` for both the server listen call and the JSON response.
18a0e3ee-2905-4d80-8b23-7d679aa62381
Create the missing config.ts file that exports the parseConfig() function expected by index.ts. The function reads PORT from environment variables with a default of 3000 and returns a config object with { port }. This matches the usage in index.ts which calls config.port for both the server listen call and the JSON response.