Fixes issue #14 by adding support for -C option

[SerpentBytes]

This PR fixes and closes #14 by adding support for the -C option.

Users can now pass a .json file with keys such as input, output, and lang to override the application's default behaviour.

[Ririio]

The code is outdated, might need to update it to fit the current version of the repository

[SerpentBytes]

I will update the code with the changes you made to the main branch 3 hours ago.

[Ririio]

I will update the code with the changes you made to the main branch 3 hours ago.

I also noticed that your "lang" command doesn't affect the current iteration of input. When I change the language to "en-CA", this change only occurs on the next config command-- the current ones will have a value of its previous language i.e., "en-US"

View your .env file after running the config to see if the value are the same for the html files

[SerpentBytes]

I have updated the code.

The .env file was not updating correctly because you are using functions like readFile and writeFile from the fs module instead of using readFileSync and writeFileSync. Since you are using asynchronous functions, they return immediately while still functioning in the background. I have updated your readFileEnv to stop execution until the values in the .env file are overwritten correctly.