Update README.md

Author: TarantulaTechnology

README.md

@@ -9,9 +9,9 @@ bitcoind-dev-base-final is a wrapper on 3.
 
 You run bitcoind-dev-base-01, 2, 3, and then use final. 
 
-Or you can build everything from one dockerfile then user ubuntu.bitcoind.dockerfile, which contains the commands from bitcoind-dev-base-01, 2, and 3.
+Or you can build everything from one dockerfile then use ubuntu.bitcoind.dockerfile, which contains the commands from bitcoind-dev-base-01, 2, and 3.
 
-I don't store the built image because it is over 3 gig, I perfer to git clone this repo and use the dockerfiles to build the image locally. Once built bitcoind can be run as often as desired.
+I don't store the built image, because it is over 3 gig, I prefer to git clone this repo and use the dockerfiles to build the image locally. Once built bitcoind can be run as often as desired.
 
 Commands to create bob and alice VMs for Docker:
 docker-machine create --driver virtualbox alice