Added cypress container (from their official image),
may be reconsidered later to choose our own
The only minor problem is node JS version mistmatch
package.json 18.16.0
docker-compose mermaid 18.16.1
docker-compose cypress 18.16.0
Host option in cypress docker container must be removed
in favor of possible configuration option.
http://localhost:9000 are currently hard-coded, that is bad
Updated ./run script with better documentation
and added some styles too it as well
Started sankey.spec.js as an example
a62719826a