Removes the .git folder from .dockerignore.

Dockerignoring the .git folder was causing the commit hash be 0000000000

Change-Id: Ic6b8524221943cc456b3fd18c820e41c33cba6e4
diff --git a/.dockerignore b/.dockerignore
index 6006ef4..b9a4484 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -6,7 +6,6 @@
 **/.idea
 .javacp*
 
-.git
 .ijwb