Update README

Author: Alex Biehl

README.md

@@ -1,18 +1,18 @@
 Testcontainers is a Haskell library that provides a friendly API to run Docker
-container. It is designed to create runtime environment to use during your automatic
-tests.
+containers. It is designed to create a runtime environment to use during your
+integration tests
 
 ``` haskell
 module Main where
 
 import           Test.Tasty
 import           Test.Tasty.HUnit
-import           TestContainer.Tasty (MonadDocker, defaultContainerRequest,
+import           TestContainer.Tasty (MonadDocker, conainerRequest,
                                       redis, run, withContainers)
 
 containers :: MonadDocker m => m ()
 containers = do
-  _ <- run redis defaultContainerRequest
+  _ <- run $ containerRequest redis
   pure ()