Improvements to documentation for smoother dev onboarding

This commit makes several changes:
1. Fixes broken links in README file
2. Adds a note to the README file about mandatory configuration
3. Fixes the dev container trying to copy a non-existent file

Signed-off-by: Misofist <misofist@heavendivided.net>

Author: Misofist

.devcontainer/devcontainer.json

@@ -10,7 +10,7 @@
         "jdkDistro": "oracle"
       }
     },
-    "postCreateCommand": "chmod +x gradlew && deno run -A scripts/download_deps.ts --yes && cp revoltbuild.properties.example revoltbuild.properties && cp sentry.properties.example sentry.properties && cp app/google-services.json.example app/google-services.json && git submodule update --init --recursive",
+    "postCreateCommand": "chmod +x gradlew && deno run -A scripts/download_deps.ts --yes && cp stoatbuild.properties.example stoatbuild.properties && cp sentry.properties.example sentry.properties && cp app/google-services.json.example app/google-services.json && git submodule update --init --recursive",
     "customizations": {
       "vscode": {
         "extensions": [

README.md

@@ -30,23 +30,28 @@ uses [Jetpack Compose](https://developer.android.com/jetpack/compose).
 
 ### Stoat for Android
 
-- [Roadmap](https://op.revolt.wtf/projects/revolt-for-android/work_packages)
-- [Stoat for Android Technical Documentation](https://revoltchat.github.io/android/)
-- [Android-specific Contribution Guide](https://revoltchat.github.io/android/contributing/guidelines/)
+- [Roadmap](https://op.stoatinternal.com/projects/revolt-for-android/work_packages)
+- [Stoat for Android Technical Documentation](https://stoatchat.github.io/for-android/)
+- [Android-specific Contribution Guide](https://stoatchat.github.io/for-android/contributing/guidelines/)
   —**read carefully before contributing!**
 
 ### Stoat
 
-- [Stoat Project Board](https://github.com/revoltchat/revolt/discussions) (Submit feature requests
+- [Stoat Project Board](https://github.com/orgs/stoatchat/discussions) (Submit feature requests
   here)
 - [Stoat Development Server](https://app.revolt.chat/invite/API)
 - [Stoat Server](https://app.revolt.chat/invite/Testers)
-- [General Stoat Contribution Guide](https://developers.revolt.chat/contrib.html)
+- [General Stoat Contribution Guide](https://developers.stoat.chat/developing/contrib/)
 
 ## Quick Start
 
-Open the project in Android Studio. You can then run the app on an emulator or a physical device by
-running the `app` module.
+1. Open the project in Android Studio.
+2. Copy `stoatbuild.properties.example`, `sentry.properties.example`, and
+   `app/google-services.json.example`. The new filenames should have the
+    ".example" suffix removed.
+3. Fill out the three new files.
+4. Run the app on an emulator or a physical device by
+   running the `app` module.
 
 In-depth setup instructions can be found
-at [Setting up your Development Environment](https://revoltchat.github.io/android/contributing/setup/)
+at [Setting up your Development Environment](https://stoatchat.github.io/for-android/contributing/setup/)