Github: Add Reviewer Checklist (#3520)

.github/pull_request_template.md

@@ -19,6 +19,15 @@ What's the context for the changes? Are there any
 Why did you choose to make these changes? Were there any trade-offs you had to consider?
 
 
+### 🔎 New Bid Adapter Checklist
+- [ ] verify email contact works
+- [ ] NO fully dynamic hosts
+- [ ] geographic host parameters are NOT required
+- [ ] NO direct use of HTTP is prohibited - *implement an existing Bidder interface that will do all the job*
+- [ ] if the ORTB is just forwarded to the endpoint, use the generic adapter - *define the new adapter as the alias of the generic adapter*
+- [ ] cover an adapter configuration with an integration test
+
+
 ### 🧪 Test plan
 
 How do you know the changes are safe to ship to production?