propagate DPP env var to docker

.env.example

@@ -3,6 +3,7 @@ DEMO=true
 # note that with DEBUG=true, logs are more verbose (include tracebacks)
 DEBUG=true
 ALLOWED_HOSTS=localhost,localhost:8000,127.0.0.1,
+DPP=false
 
 STATIC_ROOT=/tmp/static/
 MEDIA_ROOT=/tmp/media/

docker-compose.yml

@@ -9,6 +9,7 @@ services:
       - ALLOWED_HOSTS=${ALLOWED_HOSTS:-$DOMAIN}
       - DEMO=${DEMO:-false}
       - PREDEFINED_TOKEN=${PREDEFINED_TOKEN:-}
+      - DPP=${DPP:-false}
     volumes:
       - .:/opt/devicehub-django
     ports: