Command to start the node returns error

[avishkarabhishek786]

Hi,

When I run this command

docker run -p 9944:9944 -p 30333:30333 docknetwork/dock-substrate:latest --chain ./cspec/knox_raw.json --ws-external

or

docker run -p 9944:9944 -p 30333:30333 docknetwork/dock-substrate:testnet --chain ./cspec/knox_test_raw.json --ws-external

it throws error

Error: Input("Error opening spec file: No such file or directory (os error 2)")