Add milestone 4

Author: dividing-by-zaro

milestones/milestone4.md

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-TBD
+# Milestone 4
+
+This document should be completed and submitted during **Unit 8** of this course. You **must** check off all completed tasks in this document in order to receive credit for your work.
+
+## Checklist
+
+This unit, be sure to complete all tasks listed below. To complete a task, place an `x` between the brackets.
+
+- [ ] Update the status of issues in your project board as you complete them
+- [ ] In `readme.md`, check off the features you have completed in this unit by adding a ✅ emoji in front of their title
+  - [ ] Under each feature you have completed, **include a GIF** showing feature functionality
+- [ ] In this document, complete the **Reflection** section below
+
+## Reflection
+
+### 1. What went well during this unit?
+
+[👉🏾👉🏾👉🏾 your answer here]
+
+### 2. What were some challenges your group faced in this unit?
+
+[👉🏾👉🏾👉🏾 your answer here]
+
+### Did you finish all of your tasks in your sprint plan for this week? If you did not finish all of the planned tasks, how would you prioritize the remaining tasks on your list?
+
+[👉🏾👉🏾👉🏾 your answer here]
+
+### Which features and user stories would you consider “at risk”? How will you change your plan if those items remain “at risk”?
+
+[👉🏾👉🏾👉🏾 your answer here]
+
+### 5. What additional support will you need in upcoming units as you continue to work on your final project?
+
+[👉🏾👉🏾👉🏾 your answer here]