attempted to use docker for swarm(fullnode, light node and ultralight node) gas payment for light and full
you can add files to mfs by importing the file/directory from local or by importing the ipfs cid of the item
string is best for storing human-readable data like alphanumeric strings. It's more intuitive but slightly more expensive in terms of gas.
ipfs files ls -list mfs files ipfs pin ls - list ipfs files