Fancy installer

[kke]

fancy get.sh with fancy installer

usage: [-hVipugt]

example:
 $ curl https://get.k0s.sh/ | bash -s -- -r worker -t abcd123==

options:
 -u <USER>     Set user (default: k0s) (ENV: K0S_USER)
 -v <VERSION>  Install k0s version VERSION (default: latest) (ENV: K0S_VERSION)
 -c <PATH>     Install a configuration from PATH (default: generate default) (ENV: K0S_CONFIG)
 -t <TOKEN>    Cluster join token (default: none) (ENV: K0S_TOKEN)
 -p <PATH>     Use installation prefix PATH (default: /) (ENV: PREFIX)
 -r <ROLE>     Role of k0s instance (default: controller+worker) (ENV: K0S_ROLE)
 -b            Install binary only

 -h            Display this help
 -V            Display installer version 0.2.0