build static assets into go binary

[loganmeetsworld]

Is your feature request related to a problem? Please describe.
Currently, static assets are not built into the binary.

Describe the solution you'd like
We can build the static assets into the go binary to make it easier to pull and use the Docker image without needing to mount the static directory.
We can use go-bindata to compile static images into our go binary, similar to what is done in go-httpbin

[sporkmonger]

Another option I've had good luck with is https://github.com/rakyll/statik, and I'd recommend it over go-bindata as it's actively maintained.

[sporkmonger]

I'm putting together a PR for this.

[sporkmonger]

PR's ready to go.