docker: disable debug by default

.env.example

@@ -1,11 +1,11 @@
 DOMAIN=localhost
+# note that DEBUG=true make snapshot parsing more verbose
 DEMO=false
 
 STATIC_ROOT=/tmp/static/
 MEDIA_ROOT=/tmp/media/
 ALLOWED_HOSTS=localhost,localhost:8000,127.0.0.1,
 DOMAIN=localhost
-DEBUG=True
 EMAIL_HOST="mail.example.org"
 EMAIL_HOST_USER="fillme_noreply"
 EMAIL_HOST_PASSWORD="fillme_passwd"

docker-compose.yml

@@ -4,7 +4,7 @@ services:
     build:
       dockerfile: docker/devicehub-django.Dockerfile
     environment:
-      - DEBUG=true
+      - DEBUG=${DEBUG:-false}
       - DOMAIN=${DOMAIN:-localhost}
       - ALLOWED_HOSTS=${ALLOWED_HOSTS:-$DOMAIN}
       - DEMO=${DEMO:-false}