💚(ci) improve local deployment with tilt

Change the way we start django app in order to be abble to use django
admin on local deployment

bin/Tiltfile

@@ -7,7 +7,7 @@ docker_build(
     context='..',
     dockerfile='../Dockerfile',
     only=['./src/backend', './src/mail', './docker'],
-    target = 'backend-development',
+    target = 'backend-production',
     live_update=[
         sync('../src/backend', '/app'),
         run(

src/helm/env.d/dev/values.impress.yaml.gotmpl

@@ -47,6 +47,13 @@ backend:
         python manage.py create_demo --force
     restartPolicy: Never
 
+  command:
+    - "gunicorn"
+    - "-c"
+    - "/usr/local/etc/gunicorn/impress.py"
+    - "impress.wsgi:application"
+    - "--reload"
+
   createsuperuser:
     command:
       - "/bin/sh"