In order to let Hunchentoot serve the static assets from the correct
location, the *static-file-location* parameter is set before image
dumping based on the $out-envvar which is present during the build
process.
This can easily be set manually in the config file if required by a
user.
Adds a build script using ASDF's program-op to build an executable out
of the Gemma source code.
In addition a Nix derivation is provided that will both compile the
Elm source and place it in a folder, as well as create the executable.
Currently static file serving does not function as intended.