minor tweaks to scanner Dockerfile
minor tweaks to scanner Dockerfile

jasonthomas/tls-observatory,jasonthomas/tls-observatory,mozilla/tls-observatory,mozmark/tls-observatory,mozmark/tls-observatory,mozilla/tls-observatory,jasonthomas/tls-observatory,mozilla/TLS-Observer,mozilla/tls-observatory,mozilla/tls-observatory,jasonthomas/tls-observatory,jasonthomas/tls-observatory,mozilla/tls-observatory,mozmark/tls-observatory