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/server/.env.docker-local

@@ -0,0 +1,33 @@
+# ====================================================================
+# BACKEND LOCAL DOCKER ENVIRONMENT (localhost:3099)
+# ====================================================================
+# Used in docker-compose.docker-local.yml for local production testing
+# Supports frontend at localhost:8099
+# ====================================================================
+
+# Deployment Target
+DEPLOYMENT_TARGET=docker-local
+
+# Server Configuration
+NODE_ENV=production
+PORT=3000
+
+# Frontend URL (for CORS)
+FRONTEND_URL=http://localhost:8099
+
+# Discord OAuth Configuration
+VITE_DISCORD_CLIENT_ID=1466544972059775223
+DISCORD_CLIENT_SECRET=dMRPAmWxXKQdWOKzgkPbcdsHNCifqtYV
+DISCORD_REDIRECT_URI=http://localhost:8099/oauth/callback
+VITE_DISCORD_REDIRECT_URI=http://localhost:8099/oauth/callback
+
+# Challonge OAuth Configuration
+CHALLONGE_CLIENT_ID=9d40113bdfd802c6fb01137fa9041b23342ce4f100caedad6dee865a486662df
+CHALLONGE_CLIENT_SECRET=5dc805e41001281c2415b5ffd6b85a7855fc08b6019d9be2907fdb85ab2d56fc
+CHALLONGE_REDIRECT_URI=http://localhost:8099/oauth/callback
+
+# Discord User Permissions
+DISCORD_ADMIN_USERS=.fraggin
+
+# Session Security
+SESSION_SECRET=local-docker-session-secret-change-for-production