Fix typo in docker.rst (#1091)

mattinbits · muuki88 · commit 104e69eb0641 · 2018-01-17T22:08:46.000+01:00
diff --git a/src/sphinx/formats/docker.rst b/src/sphinx/formats/docker.rst
@@ -209,7 +209,7 @@ Docker Image Customization
 
 
 In order to work properly with `USER daemon` the exposed volumes are first
-created (if they do not existend) and then chowned.
+created (if they do not exist) and then chowned.
 
 Install Location
 ~~~~~~~~~~~~~~~~
