Add updating instructions for manual installations

[bls1999]

This pull adds instructions on how to automatically update the code from the repo on the server. It also addresses #12.

Perhaps a future to-do would be to add detection within the code to check to make sure the repo code/packages are all up-to-date and write to the server log if not.

[neil-lobo]

You may want to add a line as a reminder to restart the process also, since if the server is already running in the background or is being managed by a process manager a simple git pull won't be enough. I'm sure the majority of people would already know to do this but since this is about helping the people who may not know a lot about this kind of stuff it may help avoid some simple issues.

[bls1999]

You may want to add a line as a reminder to restart the process also, since if the server is already running in the background or is being managed by a process manager a simple git pull won't be enough. I'm sure the majority of people would already know to do this but since this is about helping the people who may not know a lot about this kind of stuff it may help avoid some simple issues.

Good call! LMK if a9ea0fa is what you were thinking.