try docker plugin

.drone.yml

@@ -5,8 +5,4 @@ name: build_lector
 
 steps:
   - name: build
-    image: buildah/buildah
+    image: plugins/docker
-    privileged: true
-    commands:
-      - buildah build-using-dockerfile --isolation=chroot --format docker -t lector-docker .
-