Update README.md

Author: sbuckley02

README.md

@@ -15,15 +15,31 @@ To get started, download this code to your machine
 
 ## Run the Application
 
-To run the application, run the following terminal commands after launching Docker:
+To run the application, launch Docker (by opening the app) and run the following terminal commands:
 
 ```shell
 docker-compose down
 docker-compose build
 docker-compose up
 ```
 
-Code changes will automatically cause the website and server code to reload
+When you run these commands, you will need to be in the `gt-webdev-activity-2-starter-code` directory.
+
+If you get an error that says, "docker-compose: command not found", you may have to run the following commands instead:
+```shell
+docker compose down
+docker compose build
+docker compose up
+```
+
+If you get an error that says, "permission denied", you may need to run the commands using "sudo" (if you are on Mac or Linux). In other words, the following commands:
+```shell
+docker-compose down
+sudo docker-compose build
+sudo docker-compose up
+```
+
+The React application should then be hosted on `http://localhost:3000`, which you can see in your browser. Code changes will automatically cause the website and server code to reload
 
 ## Troubleshooting