docs(doc): update all readme files

apps/declarative-to-reactive/README.md

@@ -1,33 +1,13 @@
-<h1>Declarative Programming to Reactive Programming</h1>
+# Highly Customizable CSS
 
 > Author: Thomas Laforge
 
-<!-- TODO: add Information/Statement/Rules/Constraint/Steps -->
+### Run Application
 
-### Information
+```bash
+npx nx serve declarative-to-reactive
+```
 
-### Statement
+### Documentation and Instruction
 
-### Step 1
-
-### Step 2
-
-### Constraints:
-
-### Submitting your work
-
-1. Fork the project
-2. clone it
-3. npm ci
-4. **nx serve declarative-to-reactive**
-5. _...work on it_
-6. Commit your work
-7. Submit a PR with a title beginning with **Answer:13** that I will review and other dev can review.
-
-<a href="https://github.com/tomalaforge/angular-challenges/pulls?q=label%3A13+label%3Aanswer"><img src="https://img.shields.io/badge/-Solutions-green" alt="declarative to reactive"/></a>
-
-<!-- TODO: uncomment when done late -->
-<!-- <a href='https://github.com/tomalaforge/angular-challenges/pulls?q=label%3A13+label%3A"answer+author"'><img src="https://img.shields.io/badge/-Author solution-important" alt="declarative to reactive solution author"/></a>
-<a href="{Blog post url}" target="_blank" rel="noopener noreferrer"><img src="https://img.shields.io/badge/-Blog post explanation-blue" alt="declarative to reactive blog article"/></a> -->
-
-_You can ask any question on_ <a href="https://twitter.com/laforge_toma" target="_blank" rel="noopener noreferrer"><img src="./../../logo/twitter.svg" height=20px alt="twitter"/></a>
+Challenge documentation is [here](https://angular-challenges.vercel.app/challenges/angular/13-styling.md/).