harmonises template service definition by removing reference to port 443 but does not re-align other entries (did not seem worthwhile).
harmonises default environment variables file so it is identical to the inline environment variables on master branch. This includes new-style TZ syntax and comments directing users to IOTstack wiki doco on the admin password, and Pi-hole doco on supported environment variables.
See #648 for background to this PR.
Consequential changes:
Signed-off-by: Phill Kelley 34226495+Paraphraser@users.noreply.github.com