Merge #1673

1673: Add note to README indication availability of cnd --help r=mergify[bot] a=tcharding

cnd has various command line options.  Add a comment to the README that `cnd --help` is available for usage help.

Co-authored-by: Tobin C. Harding <tobin.harding@coblox.tech>

Author: bors[bot]

README.md

@@ -36,6 +36,7 @@ All you need is ~love~ rust: `curl https://sh.rustup.rs -sSf | sh`
 4. startup cnd: `cnd` (or `./target/release/cnd` if you do not have the `~/.cargo/bin` folder in your `$PATH`)
 
 Keep in mind that in order to do a swap locally you will need to start two instances of cnd.
+Please see `cnd --help` for help with command line options.
 
 ## Setup testing/dev environment