docker: add optional DEMO env var

that includes the default snapshot import

.env.example

@@ -1 +1,2 @@
 DOMAIN=localhost
+DEMO=false

docker-compose.yml

@@ -6,6 +6,7 @@ services:
     environment:
       - DEBUG=true
       - DOMAIN=${DOMAIN:-localhost}
+      - DEMO=${DEMO:-n}
     volumes:
       - .:/opt/devicehub-django
     ports:

docker/devicehub-django.entrypoint.sh

@@ -24,6 +24,9 @@ deploy() {
                 ./manage.py add_institution example-org
                 # TODO: one error on add_user, and you don't add user anymore
                 ./manage.py add_user example-org user@example.org 1234
+                if [ "${DEMO:-}" ]; then
+                        ./manage.py up_snapshots example/snapshots/ user@example.org
+                fi
         fi
 }