Docker support

[28mm]

@brogersyh -- just merged your changes from #6 . Really wonderful stuff. I'm a faltering and infrequent user of docker, but managed to upload to the docker hub under 28mm/blast-radius, and will make this part of the release process.

Cutting an issue for discussion.

• Sometimes label text overflows its bounding box. I suspect this is to do with the fonts Graphviz uses under the alpine linux image being differently sized/proportioned than on macos.
• docker-entrypoint.sh runs terraform init. If a .terraform directory already maybe it should run terraform get, instead?
• Documentation. I've got some other changes planned in this area, so I'll probably tackle this soon.

Anyway, would be glad to have your thoughts, and happy new years 🥂

[bucrogers]

Re fonts - changed to from alpine to ubuntu and this resolved it, at least on my simple example (now renders correction as for MacOS), I've submitted another PR - although it makes the image bigger, doesn't matter much at this stage.

Terraform init vs. get - will think about this more as i apply it to my project over the coming days

Thx for putting this together, I think it has a lot of potential, will let you know how it is working for my scenarios

br

[bucrogers]

I've noticed occasionally a request (when in --serve mode) doesn't render - another request immediately after does. When this occurs, there is only the HTTP GET command in the log, nothing after.

[28mm]

• merged #8 switching to Ubuntu.
• added a note about the docker image to the README/quickstart

Haven't yet replicated the issue of failed requests that you describe. Looking to add some tests with curl and chromedriver, to hopefully uncover this sort of issue.