explain how to increase server size

[arivers]

A user could not upload larger genomes when running the web app locally.

This can be done with an extra --server.maxUploadSize parameter flag to streamlit for example to increase to 5000 MB run like this:

streamlit run /GuideMaker/guidemaker/data/app.py --server.maxUploadSize 5000

I will add instructions to the documentation.

[arivers]

Added to readme.