sendemail fails - no TLS support on docker-minimal image

**Describe the bug**
I use the fhem-docker minimal image and noticed that sending emails did not work anymore.
sendemail returned
`NOTICE => Authentication not supported by the remote SMTP server!Jul 09 11:15:46 10035a7b7822 sendemail[23963]: ERROR => Received: 530 Authentication required`

After checking on fhem cmd line i get the error
`ERROR => No TLS support! SendEmail can't load required libraries. (try installing Net::SSLeay and IO::Socket::SSL)`

I tried to use TLS with TLS=auto (first case) and TLS=yes (2nd case)

**To Reproduce**
Steps to reproduce the behavior:
1. I use function DebianMail as described in https://wiki.fhem.de/wiki/E-Mail_senden in 99_myUtils.pm
2. As described I tested with { DebianMail('adress@host.com','Test','Test-Text');; }
3. Depending on the settings in sendemail line (-o tls=yes) I get the log message

**Expected behavior**
I am not sure if the additional libraries should be included in the image or added individually