• Make raster tile renderer pool sizes configurable (#222, @otsaloma)
• Handling of promise rejections (#229, @tschaub)
• Catch incorrect headers inside mbtiles data (#232, @rani-pinchuk)
• Propagate SIGTERM correctly to node (#242, @samizdis)
• Modifications to Xvfb process startup
• Removed node-pngquant-native dependency
• Dockerfile now based on node:6-stretch