Add required env var to api integration tests

Author: jjnesbitt

dandi/tests/data/dandiarchive-docker/docker-compose.yml

@@ -36,8 +36,9 @@ services:
       DJANGO_DANDI_WEB_APP_URL: http://localhost:8085
       DJANGO_DANDI_API_URL: http://localhost:8000
       DJANGO_DANDI_JUPYTERHUB_URL: https://hub.dandiarchive.org
-      DJANGO_DANDI_INSTANCE_NAME: DANDI
-      DJANGO_DANDI_INSTANCE_IDENTIFIER: RRID:SCR_017571
+      DJANGO_DANDI_INSTANCE_NAME: DEV-DANDI
+      DJANGO_DANDI_INSTANCE_IDENTIFIER: RRID:ABC_123456
+      DJANGO_DANDI_DOI_API_PREFIX: "10.80507"
     ports:
       - "127.0.0.1:8000:8000"