update .drone.yml

.drone.yml

@@ -9,10 +9,13 @@ server:
     from_secret: ssh_key
 
 steps:
-- name: deploy
+- name: pull
   commands:
   - cd /home/marco/containers/data/sensor-web-v2
-  - git pull
+  - git reset --hard origin/master
+  - git pull origin master
+- name: deploy
+  commands:
   - cd /home/marco/containers
   - docker-compose up --build -d sensor-web-v2