Add promu support to build binary

[CharlesJUDITH]

• Modify Makefile for promu
• Add VERSION file
• Add promu.yml

[CharlesJUDITH]

I can add the .travis.yml in the same commit.

[CharlesJUDITH]

Regarding the travis build you'll need something like:

sudo: required

services:
- docker

language: go

go:
- 1.7.x
- 1.8.x
- master

matrix:
  allow_failures:
  - go: master

script:
- make style test

before_deploy:
- make promu
- promu crossbuild
- promu crossbuild tarballs
- promu checksum .tarballs

deploy:
  provider: releases
  api_key:
    secure: $GITHUB_OAUTH_TOKEN
  file_glob: true
  file: .tarballs/*
  skip_cleanup: true
  on:
    tags: true

There is a useful documentation here: https://docs.travis-ci.com/user/build-stages/deploy-github-releases/

[CharlesJUDITH]

You can see the releases from my fork https://github.com/CharlesJUDITH/alertmanager2es/releases

[CharlesJUDITH]

This issue can be closed