Added documentation about the dependencies required to build balena-cli
Added documentation about the dependencies required to build balena-cli

Change-type: minor
Signed-off-by: Trevor Sullivan <064deff2c110d69624a1749813afa7492d8667d5@balena.io>

resin-io/resin-cli,resin-io/resin-cli,resin-io/resin-cli,resin-io/resin-cli