Documentation points to do.sh

[Roavill2]

I'm currently working on trying to get the serum-dex project working as a docker image - however when running through the documentation I noticed an issue.

There are a lot of references to a script do.sh but from reading through previous issues I came across #110 which seems to say that this installation method was altered. I see that there a Cargo files in the repo so I have tried cargo build as my installation method instead.

Might be useful to update the documentation to make it slightly more user friendly. Thanks.

[let4be]

Some docs would be really nice...
@Roavill2 what command did you use to build serum-dex .so file for deployment with solana program deploy?
edit: cargo build-bpf procduces a usable .so file, my problem was I didn't quite realize that build-bpf is part of solana installation i.e. cargo-build-bpf should be in PATH(the easiest way is to use solana install script)