Go SPA Serve is a simple package that serves static files specifically focused on serving single page applications (SPA).
Generally, this can be used to instead of the stdlib http.FileServer, but the main use case is to serve a SPA with a
single entry point (e.g. index.html) and let the client-side router handle the rest.
In addition to serving static files, this package also provides a way to load environment variables from a Go struct at runtime by injecting them into the head tag of the served HTML file.
Vite is a fantastic build tool, but it doesn't support loading environment variables at runtime. This becomes quite a problem when you build a single image for multiple environments or need to build images for on-premises deployments where you can't bake in the environment variables.