Add html comments to bug report

.github/ISSUE_TEMPLATE/bug_report.md

@@ -6,21 +6,32 @@ labels: ''
 assignees: ''
 
 ---
+<!-- Thank you for contributing. These HTML commments will not render in the
+issue, but you can delete them once you've read them if you prefer! -->
 
-**Describe the bug**
-A clear and concise description of what the bug is.
+### Bug description
+<!-- Use this section to clearly and concisely describe the bug. -->
+
+#### Expected behaviour
+<!-- Tell us what you thought would happen. -->
+
+#### Actual behaviour
+<!-- Tell us what you actually happens. -->
+
+### How to reproduce
+<!-- Use this section to describe the steps that a user would take to experience this bug. -->
 
-**To Reproduce**
-Steps to reproduce the behaviour:
 1. Go to '...'
 2. Click on '....'
 3. Scroll down to '....'
 4. See error
 
-**Expected behaviour**
-A clear and concise description of what you expected to happen.
+### Your personal set up
+<!-- Tell us a little about the system you're using.
+You can see the guidelines for setting up and reporting this information at
+https://repo2docker.readthedocs.io/en/latest/contributing/contributing.html#setting-up-for-local-development. -->
 
-**Versions (please complete the following information):**
  - OS: [e.g. linux, OSX]
- - Docker version: `docker version`
- - repo2docker version `repo2docker --version`
+ - Docker version: `docker version` <!-- Run this command to get your version. -->
+ - repo2docker version `repo2docker --version` <!-- Run this command to get your version. -->
+