Pull request #619, first review: ignore vs code settings, add an example of the configuration file in doc.md

Author: latnr

.gitignore

@@ -57,3 +57,7 @@ botserverrc
 # Pycharm
 \.DS_Store
 \.idea/
+
+# VS Code
+.vscode/settings.json
+

zulip_bots/zulip_bots/bots/bugzilla/doc.md

@@ -8,6 +8,13 @@ To use Bugzilla Bot, first set up `bugzilla.conf`. `bugzilla.conf` takes 2 optio
  - site (the site like `https://bugs.xxx.net` that includes both the protocol and the domain)
  - api_key (a Bugzilla API key)
 
+ Example:
+ ```
+ [bugzilla]
+site = https://bugs.site.net
+api_key = xxxx
+ ```
+
 
 ## Usage