This is fork of Tobin Bradley's mbtiles-server which is a fork of Christopher Helm's mbtiles-server - see below for Tobin Bradley's description. This server adds a tile preview page and server stats.
These results using loadtest are from the second smallest Digital Ocean droplet requesting one pbf file from an mbtiles file, proxied with NGINX. An average map takes around 30-70 requests to render. Is this good? Seems like it, especially for smaller municipal government apps, which is our domain.
INFO Max time (s): 10 INFO Concurrency level: 100 INFO Agent: keepalive INFO INFO Completed requests: 10120 INFO Total errors: 0 INFO Total time: 10.000816574 s INFO Requests per second: 1012 INFO Mean latency: 96.9 ms INFO INFO Percentage of the requests served within a certain time INFO 50% 82 ms INFO 90% 123 ms INFO 95% 133 ms INFO 99% 480 ms INFO 100% 3220 ms (longest request) 
This fork also uses some code from tilehut, another great implementation of an mbtiles server.
Add mbtiles to the tiles folder then start the server. All mbtiles will be served. It works with raster and vector tiles.
npm install node tileserver.jsRequests look like this:
http://localhost:3000/<mbtiles-name>/3/1/2.png.