Kaniko uses / as a build folder

[neigrok]

Actual behavior
I'm building images in k8s. Kaniko uses / as a build folder and copies there files from the conext. Therefore it consumes ephemeral storage on a node and makes resource management hard.

Expected behavior
I want to be able to specify directory for build and make configure it as ephemeral volume to have a better control.

To Reproduce
Steps to reproduce the behavior:

1. make a Dockerfile with COPY . . instruction
2. build it

Additional Information

• Dockerfile

   FROM ubuntu
   COPY . .

• Build Context
  A set of random files
• Kaniko Image (fully qualified with digest)
  N/A

Description	Yes/No
Please check if this a new feature you are proposing	- [Yes]
Please check if the build works in docker but not in kaniko	- [No]
Please check if this error is seen when you use --cache flag	- [No]
Please check if your dockerfile is a multistage dockerfile	- [No]