switch to exec pipeline for CI

.drone.yml

@@ -1,34 +1,25 @@
 ---
 kind: pipeline
-type: docker
+type: exec
 name: main
 
 trigger:
   branch:
     - master
 
+platform:
+  os: linux
+  arch: amd64
+
 steps:
   - name: build
-    image: docker:latest
-    volumes:
-      - name: docker-socket
-        path: /var/run/docker.sock
     commands:
       - docker build -t registry.jfmonty2.com/minebot:latest .
 
   - name: deploy
-    image: docker:latest
-    volumes: 
-      - name: docker-socket
-        path: /var/run/docker.sock
     environment:
       REGISTRY_PWD:
         from_secret: registry_pwd
     commands:
       - echo $REGISTRY_PWD | docker login -u drone --password-stdin registry.jfmonty2.com
       - docker push registry.jfmonty2.com/minebot:latest
-
-volumes:
-  - name: docker-socket
-    host:
-      path: /var/run/docker.sock