- fetch boost sources from archives.boost.io
- build in /src rather than in /opt
- build freetype from source with -fwasm-exceptions support as the emscripten port on GitHub is outdated and archived
- build RDKit with -fwasm-exceptions support as performance is significantly better than with DISABLE_EXCEPTION_CATCHING=0
Co-authored-by: ptosco <paolo.tosco@novartis.com>