Require image for ARM64 architecture

[odidev]

Hi Team,

I am trying to use the bitbucket-build-status-resource image on arm64 platform but it seems it is not available for arm64.

I have successfully built the image using the command docker build -t image_name . on the arm64 platform by making some changes in the Dockerfile.

I have used Travis-CI to build and push the image for both the platforms.

Commit Link - https://github.com/odidev/bitbucket-build-status-resource/commit/3c6fb6d6a569977aac405036dd50911d4ad2db83

Travis link - https://travis-ci.com/github/odidev/bitbucket-build-status-resource/builds/220602287

Docker Hub Link - https://hub.docker.com/r/odidev/bitbucket-build-status-resource/tags?page=1&ordering=last_updated

Do you have any plans on releasing arm64 images?

If interested, I will raise a PR.