Add Docker Compose configuration and environment files for local and production setups

- Created docker-compose.docker-local.yml for local testing of frontend and backend services.
- Added .env.development for development environment configuration.
- Introduced .env.docker-local for local Docker environment settings.
- Added .env.production for production environment configuration for Synology deployment.

code/websites/pokedex.online/.env.development

@@ -0,0 +1,21 @@
+# ====================================================================
+# DEVELOPMENT ENVIRONMENT - Vite Dev Server (localhost:5173)
+# ====================================================================
+# This file is loaded automatically when running: npm run dev
+# Hot module reloading enabled for rapid development iteration
+# Backend OAuth proxy runs separately at localhost:3001
+# ====================================================================
+
+# Discord OAuth Configuration
+VITE_DISCORD_CLIENT_ID=1466544972059775223
+VITE_DISCORD_REDIRECT_URI=http://localhost:5173/oauth/callback
+
+# Challonge OAuth Configuration
+VITE_CHALLONGE_CLIENT_ID=9d40113bdfd802c6fb01137fa9041b23342ce4f100caedad6dee865a486662df
+VITE_CHALLONGE_REDIRECT_URI=http://localhost:5173/oauth/callback
+
+# Application Configuration
+VITE_APP_TITLE=Pokedex Online (Dev)
+
+# Debug Mode - Enable detailed logging
+VITE_DEBUG=true