README.md suggestions

[CramericaIndustries]

While dealing with the repo a few questions came in my mind which could be covered in the README.md file.

1. approx how long does it take to build the mbtiles file on a "normal" PC?
2. how much disk space do you need to build the mbtiles
3. how much disk space will the resulting mbtiles file need
4. maybe this is a stupid question: are the hill-shades included in the processing result?
5. If hill-shades are included, what is the max zoom-level?
6. is attribution needed when displaying the tiles? (Your project and SRTM 90m)

Note: there is a typo in the readme: "OpenSlopwMap" instead if "OpenSlopeMap"

[fphilippe]

I've just run successfully the container. I've added informations about performances inside README.md :

The container has been tried with success on an Azure VM, Standard_D8ds_v5 with a P30 SSD (1To, 5kIOPS). The whole process took about 45 minutes.

The disk space needed is approximatively 40 GB, and the whole mbfiles is about 3GB :

• contour.mbtiles : 2.5GB ;
• slope.mbtiles : 152MB ;
• hillshades.mbtiles : 384MB.

Yes, the hillshades are included in the processing result (see below), with a min zoom of 5.

For the last question, it's a real question for me also. In my own opinion, attribution and description could be modified. @joe-akeem, do you agree with me ?