fix Dockerfile to actually start server

[takaf3]

If you run the docker image built with current Dockerfile, container simply outputs the output of flowise command to its log and exit. This is due to CMD in Dockerfile just points flowise instead of flowise start which actually starts the server. Simple update on Dockerfile to make it actually start the server.

[HenryHengZJ]

make sure you have the bin/dev and bin/run files to have LF and not CRLF: