Set up bytemark/smtp for Ghost, set url for Ghost, further fixes, cleaned up.

Also removed the traefik disabler on the DB as it completely hid the container from Traefik (derp).

example.env

@@ -10,6 +10,11 @@ BASIC_AUTH=
 # Let's Encrypt needs an email address for registration.
 ACME_EMAIL=
 
+# The main URL of your blog. Ghost needs this when using Traefik
+# or it'll confusinglyy think its URL is localhost, breaking things 
+# like your cover image or the "visit site" link in the Dashboard
+BLOG_URL=
+
 # You can comma-separate multiple domains if need be (e.g. for www.)
 DOMAINS_BLOG=
 DOMAINS_TRAEFIK=