fix(self-hosted): use explicit /bin/sh for kong entrypoint (#46873)

docker/docker-compose.yml

@@ -109,7 +109,7 @@ services:
       SERVICE_ROLE_KEY_ASYMMETRIC: ${SERVICE_ROLE_KEY_ASYMMETRIC:-}
       DASHBOARD_USERNAME: ${DASHBOARD_USERNAME}
       DASHBOARD_PASSWORD: ${DASHBOARD_PASSWORD}
-    entrypoint: /home/kong/kong-entrypoint.sh
+    entrypoint: ["/bin/sh", "/home/kong/kong-entrypoint.sh"]
 
   auth:
     container_name: supabase-auth