Update README.md

README.md

-# ecommerce-maven
+# Ecommerce
+![Ecommerce Architecture Diagram](https://gitlab.mynisum.com/ascend/ecommerce/blob/master/ecom-web/src/resources/images/Ecommerce%20Architecture%20Diagram.jpeg)
 
+## Tech Stack
+- Back-end(API, Services, Databases): 
+  - Java, 
+  - SpringBoot, 
+  - WebFlux
+  - WebClient
+  - MongoDB
+- Front-end(Web UI/UX Development)
+  - React/Redux
+  - HTML/CSS
+
+## Schema
+
+Field       | Type      | Description
+----------- | --------- | ------------
+Id          | String    | Generated from internal set of rules
+email       | Email     | User email
+firstName   | String    | User first name
+lastName    | String    | User last name
+password    | String    | User password
+accessToken | String    | Generated session token from Google SSO
+cart        | Array     | List of products in the user's cart
+createdAt   | Datetime  | Date and time of creation
+
+### User Sample State
+```json
+User001: {
+  "id": TBD,
+  "email": "email@email.com",
+  "firstName": "Something",
+  "lastName": "Something",
+  "sessionToken": "flkjafu4p38joi34j1p541kjefghg",
+  "cart": [item1, item2, item3, item4]
+}
+```
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