Create PULL_REQUEST_TEMPLATE.md (ory#25)

.github/PULL_REQUEST_TEMPLATE.md

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+### Checklist for publishing changes to our website
+
+Prior to publishing changes to our live website at [ory.sh](https://ory.sh), it is important to work through this list with care and attention to the outlined points. 
+
+**After** making sure that all criteria are met, a developer can be asked to review the proposed changes.
+
+- [ ] **Cross reference [ory.sh](https://ory.sh) and the netlify deploy with each other, by comparing them in a side by side view. All following steps should happen in side by side comparison.**
+  - this will make even subtle changes that are not intended more visible and easier to correct
+  - the website works behaves slighty different in mobile and desktop versions - **repeat all following steps for both mobile and desktop**
+
+**Links**
+  - [ ] Every link in the navigation, external and internal, needs to be checked to work as intended
+  - [ ] Every link in the footer, external and internal, needs to be checked to work as intended
+  - [ ] Every link in the across the entire website, external and internal, needs to be checked to work as intended
+    - Note: that ORY's Documentation is not managed within this repository and thus its content is not susceptible to changes made within this repository.
+
+**Functionality**
+  - [ ] Does the navigation menu behave as intended?
+  - [ ] Does the footer menu behave as intended?
+  - [ ] Do modules that require **javascript** (e.g. code snippet, live stats, etc) work as intended?
+