Allow sending mail to unencrypted connection when deploying the example configuration

[natemago]

Currently we're getting errors in the log of microservice-mail:

microkubes_microservice-mail.1.uchrwz32tex9@pavle-lx    | 2018/12/07 13:08:03 Failed to send mail to email@example.com: unencrypted connection

The example setup of Microkubes ships with integrated dummy mail server (Mailhog). Mailhog is configured to listen on plain HTTP (unencypted connection), but microservice-mail is not configured to send to unencrypted servers. This ENV variable should be configured:
export ALLOW_UNENCRYPTED_CONNECTION=true

to allow sending the emails over plain text for the dummy mail server.

[natemago]

Current workaround:

Add the env variable explicitly after you've deployed the setup.

For docker swarm:

docker service update --env-add "ALLOW_UNENCRYPTED_CONNECTION=true" microkubes_microservice-mail