Consistency around the code fencing style guidelines

Dockerfile

@@ -15,6 +15,7 @@ RUN apk add --no-cache \
     rsync \
     build-base \
     libc6-compat
+    py-pygments
 
 ARG HUGO_VERSION
 

content/en/docs/contribute/style/style-guide.md

@@ -110,8 +110,15 @@ document, use the backtick (`).
   <tr><th>Do</th><th>Don't</th></tr>
   <tr><td>The <code>kubectl run</code> command creates a Deployment.</td><td>The "kubectl run" command creates a Deployment.</td></tr>
   <tr><td>For declarative management, use <code>kubectl apply</code>.</td><td>For declarative management, use "kubectl apply".</td></tr>
+  <tr><td>For bash code use <code>shell</code>.</td><td>For bash use <code>bash</code> or <code>sh</code>.</td></tr>
+  <tr><td>For yaml use <code>yaml</code>.</td><td>For yaml use <code>yml</code>.</td></tr>
+  <tr><td>For golang use <code>go</code>.</td><td>For golang use <code>golang</code>.</td></tr>
+  <tr><td>For python use <code>python</code>.</td><td></td></tr>
+  <tr><td>For json use <code>json</code>.</td><td></td></tr>
+
 </table>
 
+
 ### Use code style for object field names
 
 <table>