obscache: ignore permission and OS errors when writing
In practice we always update this cache along side a new transaction, with lock
taken so permission issues should not happens. However, staying on the safe side
is better. Errors during Cache update should not block Mercurial operations.
mkdir -p html
cp index.html html/
cp *.css html/
cp *.js html/
cp -R img html/
cp -R graphviz-images/ html/
netlify deploy