Update dev docs

DEVELOPMENT.md

@@ -1,5 +1,36 @@
 # Development
 
+## Debugging
+
+Visual Studio is the preferred IDE: open `Seeker.sln`, select a Configuration (Debug / Debug Mock), 
+Debug > Start Debugging (F5) / Start Without Debugging (Ctrl+F5).
+
+CLI equivalents:
+
+```powershell
+# build + fast-deploy
+dotnet build .\Seeker\Seeker.csproj -p:AndroidKeyStore=false -c "Debug Mock" -t:Install
+
+# build + fast-deploy + launch
+dotnet build .\Seeker\Seeker.csproj -p:AndroidKeyStore=false -c "Debug Mock" -t:Run
+
+# build standalone + deploy
+dotnet publish .\Seeker\Seeker.csproj -p:AndroidKeyStore=false -p:EmbedAssembliesIntoApk=true -c "Debug Mock" -f net9.0-android
+
+# view app logs
+adb logcat --pid=(adb shell pidof com.companyname.andriodapp1)
+```
+
+Notes:
+
+- Debug configs use fast deployment by default so they are not standalone apks. 
+  Use `-p:EmbedAssembliesIntoApk=true` for standalone apks.
+- `Debug` uses the real `SoulseekClient` and logs into the live
+  Soulseek server. `Debug Mock` uses an in process mock server `MockSoulseekClient` — search, 
+  download, upload behavior can be controlled via keywords (`n:N`, `t:N`, `speed:N`, `failat:N`, `stall`, etc).
+
+
+
 ## Publishing
 
 ### One-shot release script