Update .drone.yml

.drone.yml

@@ -4,6 +4,9 @@ name: default
 steps:
 - name: build
   image: plugins/hugo
+  volumes:
+  - name: cache
+    path: /output
   settings:
     hugo_version: 0.97.0
     extended: true
@@ -13,10 +16,16 @@ steps:
     output: "/tmp/output"
 - name: ls-file
   image: alpine/git
+  volumes:
+  - name: cache
+    path: /output
   commands:
     - ls -al /output
 - name: git-push
   image: appleboy/drone-git-push:0.2.0-linux-amd64
+  volumes:
+  - name: cache
+    path: /output
   settings:
     branch: gitea-pages
     remote: "git@git.ericxliu.me:eric/ericxliu-me.git"
@@ -28,3 +37,7 @@ steps:
     author_email: "eric@ericxliu.me"
     ssh_key:
       from_secret: ssh_key
+volumes:
+- name: output
+  temp:
+    medium: memory