better printing of DOMAIN var

when in settings, any command prints again DOMAIN which is boring and
inefficient

.env.example

@@ -1,5 +1,6 @@
 DOMAIN=localhost
-# note that DEBUG=true make snapshot parsing more verbose
+# note that with DEBUG=true, logs are more verbose (include tracebacks)
+DEBUG=true
 DEMO=true
 
 STATIC_ROOT=/tmp/static/

dhub/settings.py

@@ -34,8 +34,6 @@ DEBUG = config('DEBUG', default=False, cast=bool)
 
 DOMAIN = config("DOMAIN")
 assert DOMAIN not in [None, ''], "DOMAIN var is MANDATORY"
-# this var is very important, we print it
-print("DOMAIN: " + DOMAIN)
 
 ALLOWED_HOSTS = config('ALLOWED_HOSTS', default=DOMAIN, cast=Csv())
 assert DOMAIN in ALLOWED_HOSTS, f"DOMAIN {DOMAIN} is not in ALLOWED_HOSTS {ALLOWED_HOSTS}"

docker/devicehub-django.entrypoint.sh

@@ -18,6 +18,8 @@ deploy() {
 
         if [ "${DEBUG:-}" = 'true' ]; then
                 ./manage.py print_settings
+        else
+                echo "DOMAIN: ${DOMAIN}"
         fi
 
         # detect if existing deployment (TODO only works with sqlite)