Kavita

.NET/ASP.NET Core backend with a SQLite database and Angular frontend, serving files from a mounted library volume with on-the-fly thumbnail/cover generation.

.NET's efficient runtime and SQLite backing make it fast for a single instance, but there's no built-in clustering — it scales the same way as other personal-library servers, by running independent instances per library rather than distributing load.

Single pod with volumes for the library and app data directory covers most deployments; mirror the base image via mirror.gcr.io. Set the library paths as read-only mounts and expose the web UI on the platform's public URL.