Ubuntu 14.04 Trusty is no longer supported, so we need to upgrade.

server1:

[x] powerdns-secondary: pushed updated image to run on Xenial, but not sure if it's actually working. See notes on powerdns for server2.

server2:

[x] powerdns-primary: works but requires manual intervention, see readme. the secondary image's issues are similar.
[x] sympa: running on Bionic (18.04.1)
[x] backup: on Xenial (16.04.6)
[x] blog: on Xenial (16.04.5)
[x] pgsql: Running on Bionic (18.04.2).
[x] phppgadmin: Running on Xenial (16.04.5) from clonm, waiting for pull request acceptance on tozd.
[x] mysql: Upgraded to bionic, but still need to update github. See pull request
[x] phpmyadmin: ~~Still on Trusty~~ Updated to Xenial
[x] mail: ~~still on trusty. tozd has been cloned but not changed~~ upgraded to bionic at clonm/docker-postfix
[x] web: ~~Still on Trusty.~~ Updated to Xenial
[x] iperf: ~~Still on Trusty.~~ Testing new image with Xenial

[x] mongo: Xenial (16.04.5)
[x] iperf: Running Xenial (16.04.6).
[x] rocketchat: ~Xenial (16.04.6), but runit doesn't fully work yet~ Now on Bionic, runit works
[x] nginx-proxy: ~~Still on Trusty~~ Upgraded to Xenial via clonm fork
[x] owncloud: Upgraded but not yet deployed
[x] postgresql: ~Image updated but not deployed~ Deployed and documented