Restoring Firestore exercise

Author: deltaepsilon

SUMMARY.md

@@ -35,8 +35,8 @@
 * [Walkthrough](cloud-firestore/walkthrough.md)
 * [Security Rules](cloud-firestore/security-rules.md)
 * [Indexes](cloud-firestore/indexes.md)
-* [Notes](cloud-firestore/notes.md)
 * [Exercise](cloud-firestore/exercise.md)
+* [Notes](cloud-firestore/notes.md)
 
 ## Realtime Database
 

cloud-firestore/exercise.md

@@ -1,2 +1,41 @@
-# Exercise
+# Challenge
+
+## Find the repo
+
+We'll be working on a branch of our [firelist-react](https://github.com/how-to-firebase/firelist-react) repo named [challenge-firestore](https://github.com/how-to-firebase/firelist-react/tree/challenge-firestore).
+
+## Localhost installation
+
+Pull [the repo](https://github.com/how-to-firebase/firelist-react) directly from GitHub...
+
+```text
+git clone https://github.com/how-to-firebase/firelist-react.git
+cd firelist-react
+git checkout challenge-firestore
+```
+
+## Edit environment files
+
+Update the following files with your own project details:
+
+* `/.firebaserc`
+* `/public/environments/environment.dev.js`
+* `/public/environments/environment.js`
+
+## Start the app
+
+Once you're on the branch, make sure to run `yarn` or `npm install` to get your Node.js dependencies.
+
+Then run `yarn start` or `npm run start` to spin up the development server.
+
+```text
+yarn
+yarn start
+```
+
+## Complete the challenge
+
+Search the codebase for `Challenge Firestore` to find all of the challenges.
+
+Read the comments and complete the steps in those files.