add module 3 outline

Author: Shrreya

module3-crud-and-data-models/README.md

@@ -1 +1,33 @@
 # Module 3: CRUD and Data Models
+
+Last revised: 09/11/2021
+
+## Summary
+A high proportion of applications can be distilled into four simple operations: Create,
+Read, Update, and Delete. Students learn to connect their Express.js server to a
+MongoDB database using Mongoose.js and implement models and controllers to
+perform CRUD operations.
+
+## Outline
+
+- 1 [Schema and CRUD [R]](../module3-crud-and-data-models/r1-schema-and-crud/README.md)
+    
+- 1.1 [Model View Controller (MVC) [R]](../module3-crud-and-data-models/r1.1-model-view-controller/README.md)
+    
+- 1.2 [Principles of setting up your schema [R]](../module3-crud-and-data-models/r1.2-principles-of-setting-up-your-schema/README.md)
+    
+- 1.3 [Setup project schema using MongoDB [L]](../module3-crud-and-data-models/r1.3-setup-project-schema/README.md)
+     
+- 1.4 [Setup project schema using Mongoose [L]](../module3-crud-and-data-models/r1.4-setup-project-schema-using-mongoose/README.md)
+
+- 1.5 [Setup project schema using Mongoose with embedding [L]](../module3-crud-and-data-models/r1.5-setup-project-schema-using-mongoose-embedding/README.md)
+
+- 2 [Models and Controllers in Mongoose [R]](../module3-crud-and-data-models/r2-models-and-controllers-in-mongoose/README.md)
+    
+- 2.1 [CRUD with Mongoose [L]](../module3-crud-and-data-models/r2.1-crud-with-mongoose/README.md)
+
+- 3 [Custom model methods [R]](../module3-crud-and-data-models/r3-building-custom-methods-on-mongoose/README.md)
+    
+- 3.1 [Building custom methods [L]](../module3-crud-and-data-models/r3.1-building-custom-methods/README.md)
+
+- 4 [Summary](../module3-crud-and-data-models/r4-summary/README.md)