Geekblog is a simple Hugo theme for personal blogs. It is intentionally designed as a fast and lean theme and may not fit the requirements of complex projects. If a more feature-complete theme is required there are a lot of got alternatives out there. This post helps you to get started with the Geekblog theme, including initial setup and basic configuration.
The theme bundles some handy shortcodes that tries to cover common situations.
Mermaid is library for generating SVG charts and diagrams from text.