@motdog If you could post your config file without the secret’s in it. Secrets being api keys and other sensitive information I can help you further.
If you enclose your code with ``` it will be more readable.
//your code here
Answers for your questions
To install de dependecies for MMM-DarkSkyForecast, you will need to use the command prompt (can be found in the start menu). You can use this info to navigate to the right folder being MMM-DarkSkyForecast. When you are in the right folder use the command npm install to install all the dependecies.
Latitude and longitude can be found on here
Good luck and if you have any more questions ask!