Add .dockerignore to exclude intermediate Godeps output.

These files will cause errors in the Docker build if the host system has a different version of Go than the base image.
2015-04-20 13:10:40 -07:00 · 2015-04-20 13:10:40 -07:00 · 2615fbed67
--- a/.dockerignore
+++ b/.dockerignore
@ -0,0 +1,2 @@
+Godeps/_workspace/pkg
+Godeps/_workspace/bin