Oh my dotenv! If you work with NodeJS at some point you will use and implement dotenv. It loads environment variables from a .env file (configurable name btw), into process.env, following the 12 Factor App methodology of separating environment from code. Pure awesomeness, and makes development configuration loading a breeze mimicking your higher environments.
Avoid using ts-node when performance testing
Often times when performance testing, or comparing resource utilization (ex NodeJS vs Java), I have seen developers load testing, performance testing, and even one-off testing, with ts-node. ts-node is an awesome piece of kit, but it is for rapid prototyping, watching, and development only, it is not a production runtime.
Kamau Washington 