For such a light demand and fixed site requirements, a single-file sqlite dB is probably best. Modern Sqlite has full-text capabilities that are quite powerful

For such a light demand and fixed site requirements, a single-file sqlite dB is probably best. Modern Sqlite has full-text capabilities that are quite powerful and relatively easy to implement. https://www.sqlite.org/fts5.html https://www.sqlite.org/fts5.html