penpot: Migrate Env vars to new flag system

roles/penpot/templates/docker-compose.yml

@@ -32,10 +32,7 @@ services:
 {% if penpot_gitlab is defined %}
       - PENPOT_GITLAB_CLIENT_ID={{ penpot_gitlab.client_id }}
 {% endif %}
-      - PENPOT_ALLOW_DEMO_USERS=false
-      - PENPOT_DEMO_WARNING=false
-      - PENPOT_LOGIN_WITH_LDAP=false
-      - PENPOT_REGISTRATION_ENABLED={{ penpot_registration_enabled | lower }}
+      - PENPOT_FLAGS="{% if penpot_registration_enabled %}enable{% else %}disable{% endif %}-registration disable-demo-users disable-demo-warning disable-login-with-ldap"
     labels:
       - "traefik.enable=true"
       - "traefik.http.routers.penpot.rule=Host(`{{ penpot_domain }}`) && PathPrefix(`/`)"
@@ -75,9 +72,7 @@ services:
       # Should be set to the public domain when penpot is going to be
       # served.
       - PENPOT_PUBLIC_URI=https://{{ penpot_domain }}
-
-      # User registration
-      - PENPOT_REGISTRATION_ENABLED={{ penpot_registration_enabled | lower }}
+      - PENPOT_FLAGS="{% if penpot_registration_enabled %}enable{% else %}disable{% endif %}-registration disable-demo-users disable-login-with-ldap disable-smtp"
 
       # comma-separated domains, defaults to `""` which means that all domains are allowed)
       - PENPOT_REGISTRATION_DOMAIN_WHITELIST=""