build: change drone config to fix untrusted repo

.drone.yml

@@ -1,24 +1,14 @@
 kind: pipeline
+type: docker
 name: portfolio
 
 steps:
   - name: build
-    image: docker:latest
+    image: plugins/docker
-    volumes:
-      - name: dockersock
-        path: /var/run/docker.sock
     commands:
       - docker build -t portfolio-image .
 
   - name: deploy
-    image: docker:latest
+    image: plugins/docker
-    volumes:
-      - name: dockersock
-        path: /var/run/docker.sock
     commands:
       - docker run -p 8180:8180 -d portfolio-image
-
-volumes:
-  - name: dockersock
-    host:
-      path: /var/run/docker.sock