Needs update to latest lazylibrarian and update to alpine.python3

[dsm1212]

I guess this is not being maintained and the container won't rebuild due to some alpine changes. To get it updated I had to change Dockerfile to use alpine.python3, then comment out the line with py-html5lib on it, add html5lib and webencodings to the pip install line. Save the Dockerfile. Navigate to the run file and change the command line from python to python3. Rebuild using whatever name you want for the image like "docker build -t lazylib:1.0 ." THen you can use just lazylib in your compose file. LazyLibrarian is up to latest when you do this.