Signed-off-by: Alexander Detsch <alex@alex-detsch.de>

Signed-off-by: Alexander Detsch <alex@alex-detsch.de>

added possibility to copy authorized-key-line without hazzle, improved user input for copying key to server, autogenerate passphrase

fixed source-directory in config.yaml-template, fixed borgmatic-path in crontab.txt-template, improved readme

merged changes from docker-borgmatic (fixed config-zip creation, added healthchecks-hook), setting keyfile and config paths to our working directory

moved realpath-installation to extra line, creating backup- and restore directories if not already existing