HandleBody figures out whether a incoming request is in JSON or multipart/form-data and decodes it appropriately.

Highlight uses Chroma to highlight code in documents.

Logger uses zerolog to log information about each request (log level = INFO).

RenderError renders errors to the client using an HTML template.

WriteError writes an Error object (e) to an HTTP response writer (w).

WriteJSON writes a Request payload (p) to an HTTP response writer (w).

DocumentResponse is a document object.