added missing mb-util installation

tools/Dockerfile

@@ -1,14 +1,15 @@
-# docker image containing all tools in order to transform a GeoTIFF into a PNG terrain tileset
-
 FROM osgeo/gdal:ubuntu-small-latest
+# docker image containing all tools in order to transform a GeoTIFF into a PNG terrain tileset
 
 LABEL MAINTAINER thomas.halwax@syncpoint.io
 
 ENV LANG=C.UTF-8
 ENV LC_ALL=C.UTF-8
 ## install pip3 and Mapbox's RasterIO (rio)
 ## install plugins for rio from https://github.com/mapbox/rasterio/wiki/Rio-plugin-registry
-RUN apt-get -y update && apt-get install -y --fix-missing python3-pip vim \
+RUN apt-get -y update && apt-get install -y --fix-missing python3-pip vim proj-bin \
     && pip3 install rasterio \
     && pip3 install rio-rgbify \
+    && pip3 install rio-mbtiles \
+    && pip3 install mbutil \
     && apt-get clean