Using Alpine 3.6 version as base image

[sudhakso]

We would like to consume Flagr for feature management. We don't want to ship any containers based on Debian due to a local policy.
Instead, we would like to use "Alpine - 3.6" version - https://hub.docker.com/_/alpine/.

Expected Behavior

Flagr should build and run on Alpine base image.

Current Behavior

Untested

Possible Solution

None that is offered in the checkr community.

Context

Due to local policy, we cannot use Debian to distribute containers. And we would like Flagr to be built using Alpine.

Your Environment

• Version used (flagr version): Latest
• Server type and version: X86_64
• Operating System and version (uname -a): Alpine 3.6
• Link to your project: Not yet public

[zhouzhuojie]

Does your environment support multi-stage docker build? I'm thinking of moving the built binary to alpine3.6

[zhouzhuojie]

Related pr #107 #109

[sudhakso]

We were able to run flagr with alpine3.6.