Create Heroku support

[kkdai]

Hi
I love your contribution, and it would be great if this tool could be easy to host on Heroku.
Thank you

[cshum]

Hi @kkdai thanks for you suggestion.

I am familiar with Heroku hosting, but I assume the deployment steps would be pretty standard across Docker images?

Imagor is stateless (except File System config), should work out of box by running the Docker image with minimal config.

Is there anything specific steps can be added for Heroku? A pull request for Heroku deployment template or documentations, would be very welcomed.

[kkdai]

Yes, sure. The PR is ready to send after I confirm with you the design for "-imagor-unsafe" flag.
It seems the "-imagor-unsafe" default is off(make it more strict), but it will fail on Heroku run.
Which is equal to docker run -p 8000:8000 shumc/imagor.
What is your suggestion for this?

[cshum]

Does heroku run supports environment variables configuration? All configuration flags have their environment variable equivalent, for example:

# both are equivalent

/usr/local/bin/imagor -imagor-unsafe -imagor-secret 1234

IMAGOR_UNSAFE=1 IMAGOR_SECRET=1234 /usr/local/bin/imagor

https://github.com/cshum/imagor#configuration

[kkdai]

Thank you for the suggestion.

[cshum]

Thanks for the pull request!

[kkdai]

Closed by #142, thank you.