Add PR template

.github/pull_request_template.md

@@ -0,0 +1,18 @@
+<!--
+Thank you for contributing to ccremer/charts. Before you submit this PR I'd like to
+make sure you are aware of our technical requirements and best practices:
+
+* https://github.com/helm/charts/blob/master/CONTRIBUTING.md#technical-requirements
+* https://github.com/helm/helm/tree/master/docs/chart_best_practices
+
+-->
+
+#### What this PR does / why we need it:
+
+* Short summary
+
+#### Checklist
+<!-- Place an '[x]' (no spaces) in all applicable fields. Please remove unrelated fields. -->
+- [ ] Chart Version bumped
+- [ ] Variables are documented in the README.md **in its own single commit** (for cherrypicking to GH pages)
+- [ ] Title of the PR contains starts with chart name e.g. `[chart]`