1.0.3: Release Tiny Alpine 3.5 Docker Image (#24)

* Add new Dockerfile

* Test custom build-harness

* Test 2-stage build process

* undo test

* fix path

* fix order of operations

* Rewrite to use docker for building

* remove language declaration

* escape $

* Fix vars

* Disable test

* fix test

* golang:1.8 test fixes

* golang:1.8 test fixes

* add group tpl

* Debug logging

* missing brace

* define log

* use gid for test

* fix test

* fix lint

* remove unused dockerfile

* add libc6-compat

* Export DOCKER_IMAGE_NAME

* add ca-certificates