Move all deployment methods into their own section

This makes our support for each method explicit, and also allows us to add more deployment methods in the future.

[ci skip]

docs/template.html

@@ -131,9 +131,6 @@
             <a href="#" class="list-group-item disabled">Deployment</a>
 
             <a href="/{{NAME}}/deployment/application-deployment/" class="list-group-item">Deploying an Application</a>
-            <a href="/{{NAME}}/deployment/buildpacks/" class="list-group-item">Buildpack Deployment</a>
-            <a href="/{{NAME}}/deployment/dockerfiles/" class="list-group-item">Dockerfile Deployment</a>
-            <a href="/{{NAME}}/deployment/images/" class="list-group-item">Image Tagging</a>
             <a href="/{{NAME}}/deployment/application-management/" class="list-group-item">Application Management</a>
             <a href="/{{NAME}}/deployment/remote-commands/" class="list-group-item">Remote Commands</a>
             <a href="/{{NAME}}/deployment/one-off-processes/" class="list-group-item">One Off Processes/Cron</a>
@@ -141,6 +138,12 @@
             <a href="/{{NAME}}/deployment/user-management/" class="list-group-item">User Management</a>
             <a href="/{{NAME}}/deployment/zero-downtime-deploys/" class="list-group-item">Zero Downtime Deploy Checks</a>
 
+            <a href="#" class="list-group-item disabled">Deployment Methods</a>
+
+            <a href="/{{NAME}}/deployment/methods/buildpacks/" class="list-group-item">Buildpack Deployment</a>
+            <a href="/{{NAME}}/deployment/methods/dockerfiles/" class="list-group-item">Dockerfile Deployment</a>
+            <a href="/{{NAME}}/deployment/methods/images/" class="list-group-item">Docker Image Deployment</a>
+
             <a href="#" class="list-group-item disabled">Configuration</a>
 
             <a href="/{{NAME}}/configuration/environment-variables/" class="list-group-item">Environment Variables</a>