+ - volume:
+ host: /etc/ssl/certs/community.openstreetmap.org.pem
+ guest: /shared/ssl/ssl.crt
+ - volume:
+ host: /etc/ssl/private/community.openstreetmap.org.key
+ guest: /shared/ssl/ssl.key
+ - volume:
+ host: /srv/community.openstreetmap.org/files/policyd-spf.conf
+ guest: /etc/postfix-policyd-spf-python/policyd-spf.conf