Add Dockerize

[dhoeric]

For #124

Added some examples for demo as well.
Please let me know if anything needed to be updated.

@mbernier edit: resolves #124

[SendGridDX]

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[kyl0b1te]

@dhoeric @SendGridDX hello guys, with last docker update multi staging docker file is available. I think this can help to reduce the size of container

[dhoeric]

@zhikiri Thanks for your input.
But this image requiring a go runtime to compile user's .go for testing, may not be suitable to take off in this use case?

[kyl0b1te]

@dhoeric well, I think you're right :) It can live without multi staging dockerfile.

[mbernier]

Rather than having the key embedded in the script, could you have it pull from an environment variable that is loaded into the docker via a docker-compose file?

This would also allow you to have a "volume" param that would keep the source local for development purposes!

[dhoeric]

@mbernier thanks for your comment, the code is updated, feel free to review!

[mbernier]

OMG this is awesome! I really like how you set this up, thank you!

@thinkingserious check this out.

[thinkingserious]

Hello @dhoeric,

Thanks again for the PR!

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