Create a docker image for easily running (or building) pact

[mightybyte]

It might be nice, especially when it comes to supporting more operating systems if people could get running with something simple like:

docker run kadena.io/pact

[emremp]

Hi I created a docker file

gist link

docker run -p 8080:8080 <image_id>

with this you can send rest requests to pact api endpoints

[emilypi]

Thanks for the contribution @emremp! We'll take a look and discuss it.