Polish the dockerfile

[4TT1L4]

Problem:

• There are a few flaws in the current docker file.

The following comment was not updated:

https://github.com/geniusyield/market-maker/blob/569dbb56ed8051100cad937f52e7c1c4d4b30af1/Dockerfile#L62

The binary is not installed properly, so there is a depedency check running on each startup. This is not necessary and we should be able to get rid of this by installing the binary and running it directly,in stead of using cabal run