Merge pull request 'move ci to docker' (#156) from burble-20200830/update-ci into master

Reviewed-on: https://git.dn42.dev/dn42/registry/pulls/156
Reviewed-by: schema-checker <schema-checker@noreply.dn42.us>

.drone.yml

@@ -1,12 +1,16 @@
 ---
 kind: pipeline
-type: exec
-name: env_test
+type: docker
+name: pull-checks
 
 steps:
-- name: env_script
+- name: squashbot
+  image: dn42/pipeline
+  environment:
+   SQUASHBOT_TOKEN:
+     from_secret: SQUASHBOT_TOKEN
   commands:
-  - /usr/local/bin/env.sh
+   - /scripts/squashbot
 
 trigger:
   event: