Fix postfix networks, closes #309, #310

alpine.sh

@@ -86,6 +86,7 @@ chroot /mnt setup-timezone -z Europe/Prague
 apk --no-cache add apache2-utils gettext
 wget https://dl.dasm.cz/basic.tar -O - | tar xf - -C /mnt
 chroot /mnt apk --no-cache add ca-certificates curl bridge e2fsprogs-extra gettext iptables kbd-misc libressl postfix nginx util-linux acme-sh@vm lxc@vm vmmgr@vm
+chroot /mnt newaliases
 for SERVICE in cgroups consolefont crond iptables networking nginx ntpd postfix swap urandom vmmgr; do
     ln -s /etc/init.d/${SERVICE} /mnt/etc/runlevels/boot
 done

basic/etc/postfix/main.cf

@@ -1,5 +1,6 @@
 append_dot_mydomain = no
 biff = no
 compatibility_level = 2
+mynetworks = 127.0.0.0/8 172.17.0.0/16 [::1]/128
 smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
 smtp_use_tls = yes