Changed some wording.

README.md

@@ -207,7 +207,7 @@ On order to build the Docker image you have to type the following command:
  $ docker build --tag mbredel/thesis-template --file Dockerfile.local .
 ```
 
-Creating the image requires a working (and hopefully fast) Internet connection. It may take several minutes to download the required base-images as well as all needed dependencies. You only have to create the image once. When the image is build, you can run the Docker container by executing the following command
+Creating the image requires a working (and hopefully fast) Internet connection. It may take several minutes to download the required base-images as well as all needed dependencies. You only have to create the image once. Once the image is created, you can run the Docker container by running the following command
 
 ```
  $ docker run --volume $(pwd):/thesis-template/ mbredel/thesis-template && docker rm $(docker ps -lq)