DockerFile for Mac users to run DeepfaceLab with CPU Mode (#95)

* fix localization nullpointer exception

* fix devicelib error line:61,remove e

* support create docker from cpu dockerfile

* support preview or not when train(resolve cannot connect to X server)

.gitignore

@@ -12,4 +12,6 @@
 !mathlib
 !models
 !nnlib
-!utils
+!utils
+!Dockerfile*
+!*.sh