Rebuild local NAS image from source on Compose deployment

tests/docker/nas-config.mjs

@@ -143,6 +143,8 @@ esac
     config.volumes.hop_database.name = checkedVolume;
     Object.assign(config.services.hop, {
       image: process.env.HOP_CHECK_IMAGE,
+      // This fixture checks mounts with a prebuilt image, without source builds.
+      pull_policy: 'never',
       container_name: checkedContainer,
       ports: [],
       network_mode: 'none',