Update issue templates (#26)

Author: xgerman

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,35 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: triage
+assignees: xgerman
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. Install Document DB Operator following ...
+2. Deploy a new Document DB Cluster using the manifest ...
+3. Connect to the Document DB Cluster using ...
+4. Test the behavior ...
+5. See error ...
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Kubernetes Environment (please complete the following information):**
+ - DocumentDB Operator Version [e.g. 123]
+ - Kubernetes Version [e.g. 23]
+ - Kubernetes Environment [e.g. AKS, KIND]
+ - Cert Bot Version [e.g. 123]
+ - CNPG Version (if not installed by our helm chart) [e.g. 123] 
+
+**Additional context**
+Add any other context about the problem here.