Unable to Pass Data to Fastboot through Middleware

I was working on a feature that used an npm package to get the IP address of a client conncting to the Fastboot server, which was configured as a middleware in `fastboot-server.js`, which initializes Fastboot using this middleware. However, it appears that there is no way to pass data to Fastboot through fastboot-express-middleware, which makes it very challenging to extend Fastboot using other middlewares.

Let me know if you need more information about my use case, but overall I think it would be important to maintain modularity by allowing information to be passed into Fastboot through this middleware.

Start by reading fastboot-server.js and the fastboot-express-middleware initialization path described in the issue. Determine how middleware currently interacts with FastBoot and what request data must be preserved; the issue is complete when a defined, tested way to pass middleware-provided information into FastBoot is agreed and implemented.

Written by the indexing model from the issue text.