add new env var

Dockerfile

@@ -45,6 +45,7 @@ RUN DATABASE_URL=postgres://x/x \
     DEFAULT_STAFF_GROUPS=x \
     NASTENKA_API_URL=x \
     NASTENKA_API_TOKEN=x \
+    CHOBOTNICE_API_URL=x \
     python manage.py collectstatic --noinput --settings=registry.settings.production
 
 RUN bash -c "adduser --disabled-login --quiet --gecos app app &&  \