update drone docs

DOCS.md

@@ -10,22 +10,6 @@ image: lizheming/drone-wechat
 
 The Wechat plugin posts build status messages to your account. The below pipeline configuration demonstrates simple usage:
 
-```diff
-pipline:
-  wechat:
-    image: lizheming/drone-wechat
-+   sckey: xxxxxx
-    title: ${DRONE_REPO_NAME}
-    message: >
-      {%if success %}
-        build {{build.number}} succeeded. Good job.
-      {% else %}
-        build {{build.number}} failed. Fix me please.
-      {% endif %}
-```
-
-If you want push notification with your own wechat corp id, you can config like this:
-
 ```diff
 pipeline:
   wechat:
@@ -77,9 +61,6 @@ msg_url
 btn_text
 : The text for the button on the card
 
-sckey
-: SCKEY get from [ServerChan](http://sc.ftqq.com)
-
 title
 : Notification title
 
@@ -106,9 +87,6 @@ wechat\_to\_user
 wechat\_to\_tag
 : The tag ids to send the message to
 
-wechat_sckey
-: SCKEY get from [ServerChan](http://sc.ftqq.com)
-
 # Template Reference
 
 repo.owner

Dockerfile

@@ -3,7 +3,7 @@ FROM mhart/alpine-node:8.9.3
 LABEL maintainer="lizheming <i@imnerd.org>" \
   org.label-schema.name="Drone Wechat Notification" \
   org.label-schema.vendor="lizheming" \
-  org.label-schema.schema-version="1.1.0"
+  org.label-schema.schema-version="1.2.0"
 
 WORKDIR /wechat
 COPY package.json /wechat/package.json