As I understand it, Netlify Environment Variables have some restrictions on size. Looking into it, they use AWS under the hood and are subject to the same restrictions [as this service](https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/environments-cfg-softwaresettings.html#environments-cfg-softwaresettings-console). Most notably:

* Keys can contain up to 128 characters. Values can contain up to 256 characters.
* The combined size of all environment properties cannot exceed 4,096 bytes when stored as strings with the format key=value.

I'm passing JWT keys to my serverless functions via environment variables in Netlify. The keys in question (particularly the private key) are long enough to flout these restrictions. My private key is at least 3K characters; well over the 256 outlined above.

How have others managed to get round this issue? Is there another way to add lengthy keys without having to include them in your codebase?