Add SPDDK build

serving/docker-compose.yml

@@ -90,7 +90,10 @@ services:
 
   # --- NVMe/TCP target (serves rootfs.erofs, read-only) ----------------------
   nvmeof:
-    image: spdk/spdk:v24.09   # pin to a tag you've tested
+    # Prebuilt by CI (.gitea/workflows/spdk-image.yaml) and pulled here — no
+    # official spdk/spdk image exists, so we compile our own once in the
+    # pipeline. Local-dev alternative: replace this line with `build: ./spdk`.
+    image: ${SPDK_IMAGE}:${SPDK_VERSION}
     network_mode: host        # NVMe/TCP listener on ${TARGET_PORT}
     privileged: true          # hugepages + IPC_LOCK/SYS_ADMIN for SPDK
     restart: unless-stopped