Update issue templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is. Please do not use an Issue to ask for help deploying the stack in the cluster. Troubleshoot your cluster configuration first.
+
+**Troubleshooting**
+
+1. Which kind of Kubernetes cluster are you using? (Kubernetes, K3s, etc)
+2. Are all pods in "Running" state? If any is in CrashLoopback or Error, check it's logs.
+2. You cluster already works with other applications that have HTTP/HTTPS? If not, first deploy an example NGINX and test it's access thru the created URL.
+3. If you enabled persistence, do your cluster already provides persistent storage (PVs) to other applications?
+4. Does it provides dynamic storage thru StorageClass?
+
+**Customizations**
+
+1. Did you customize `vars.jsonnet`? Put the contents below:
+
+```jsonnet
+# vars.jsonnet content
+```
+
+2. Did you change any other file? Put the contents below:
+
+```jsonnet
+# file x.yz content
+```
+
+**What did you see when trying to access Grafana and Prometheus web GUI**
+A clear and concise description with screenshots from the URLs and logs from the pods.
+
+**Additional context**
+Add any other context about the problem here.