Apply suggestions from code review

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: FidelusAleksander

.devcontainer/devcontainer.json

@@ -1,6 +1,6 @@
 {
   "name": "Python 3",
-  "image": "mcr.microsoft.com/vscode/devcontainers/python:3.13",
+  "image": "mcr.microsoft.com/devcontainers/python:3.13",
   "forwardPorts": [8000],
   "postCreateCommand": "pip install -r requirements.txt",
   "customizations": {

.github/steps/3-step.md

@@ -95,7 +95,7 @@ Let's use Copilot to change the website to display signed up students under each
 
 Let's experiment with some more open-ended requests that will add more functionality to our web application.
 
-If you don't get the desired results, you can try other models or provided followup feedback to refine the results.
+If you don't get the desired results, you can try other models or provide follow-up feedback to refine the results.
 
 1. Make sure your Copilot is still in **Agent** mode.
 
@@ -119,7 +119,7 @@ If you don't get the desired results, you can try other models or provided follo
    > 🪧 **Note:** In this lab we explicitly include the `#codebase` tool to get the most repeatable results.
    > Feel free to try the prompt **without** `#codebase` and observe whether Agent Mode decides to gather broader project context on its own.
 
-1. When Copilot is finished, inspect the code changes and the results on the website. If you like the results, press the **Keep** button. If not, try providing Copilot some feedback to refined the results.
+1. When Copilot is finished, inspect the code changes and the results on the website. If you like the results, press the **Keep** button. If not, try providing Copilot some feedback to refine the results.
 
    > 🪧 **Note:** If you don't see updates on the website, you may need to restart the debugger
 

.github/steps/4-step.md

@@ -41,7 +41,7 @@ Your backend still has zero test coverage. Use **Plan Agent** to create a plan,
    > I want to add backend FastAPI tests in a separate tests directory.
    > ```
 
-1. Wait for Copilot to generate it's first plan. If it asks you any questions, answer them to the best of your ability. 
+1. Wait for Copilot to generate its first plan. If it asks you any questions, answer them to the best of your ability. 
 
    > 🪧 **Note:** Don't worry about getting it perfect, you can always refine the plan later.
 
@@ -68,7 +68,7 @@ Your backend still has zero test coverage. Use **Plan Agent** to create a plan,
 
    Notice that clicking the button switched from **Plan** to **Agent Mode**. From this point on, Copilot can edit your codebase, just like before.
 
-1. Watch Copilot implement the plan you just created. It may ask for permissions to run certain tools (e.g run commands or create virtual environments). Approve these permissions so it can continue working.
+1. Watch Copilot implement the plan you just created. It may ask for permissions to run certain tools (e.g., run commands or create virtual environments). Approve these permissions so it can continue working.
 
 1. Review the changes and make sure tests run successfully. If needed, continue guiding until implementation is complete.