Make sure you've ran the script at least once so the FXServer can install all required dependencies (it also install developer dependencies).
Use an IDE (like Visual Studio Code) to edit the TypeScript files.
Visual Studio Code has native Typescript support and makes it easy to edit these files and tell you if you fuck up. [INSERT GIF ABOUT CORRECT AND INCORRECT VALUES] Example of how Typescript warns of an incorrect value.
Our config fields are well documented and have auto completion/suggestions where possible. You can see this by hovering your mouse of a config key.
Display of documentation of our config keys.
[VSCode] You can open the auto completion window by putting your cursor where a value should be and pressing CTRL + Space.
Auto completion menu.
Make sure you save the config files, restart the script and the script will compile the new config.