ohttp-client docker app does not support extra command line parameter

[bodzhang]

Running the Rust ohttp-client directly, one can specify command line parameters using -H, -O, -T, etc.

The ohttp-client docker app invokes a run.sh script, which support using env. variables to pass in parameters such as -target-path, file for -F, etc., but not -H, -O, -T parameters