Fix duplicate ingest_appeal_docs in docker-compose

- Skip SENTRY_DSN is not defined warning by docker-compose

Author: thenav56

docker-compose.yml

@@ -31,7 +31,7 @@ x-server: &base_server_setup
     APPEALS_USER: ${APPEALS_USER}
     APPEALS_PASS: ${APPEALS_PASS}
     # Sentry
-    SENTRY_DSN: ${SENTRY_DSN}
+    SENTRY_DSN: ${SENTRY_DSN:-}
     SENTRY_SAMPLE_RATE: ${SENTRY_SAMPLE_RATE:-0.2}
     # Maintenance mode
     DJANGO_READ_ONLY: ${DJANGO_READ_ONLY:-false}