Add fs binding

[taorepoara]

See the doc: https://docs.docker.com/reference/dockerfile/#run---mounttypebind and https://docs.docker.com/build/building/best-practices/#add-or-copy

define a bind field (with a plural alias) with the list of mounted elements.

[taorepoara]

The run could be moved to a separated struct that includes all the elements linked to the run (binds, caches, secrets, networks) like it's done for CopyOptions