Add environment variable support and update Docker configuration

.env.example

@@ -0,0 +1,8 @@
+# Server Configuration
+SERVER_ID=waylume-server-1
+
+# Supabase Configuration
+SUPABASE_KEY=your_supabase_service_role_key_here
+
+# Docker Port Configuration (optional)
+# EXTERNAL_PORT=3000

.gitignore

@@ -1,3 +1,6 @@
 # https://dart.dev/guides/libraries/private-files
 # Created by `dart pub`
 .dart_tool/
+
+# Environment variables
+.env

docker-compose.yml

@@ -9,7 +9,7 @@ services:
     env_file:
       - .env
     ports:
-      - "3000:3000"
+      - "${EXTERNAL_PORT:-3000}:3000"
       - "51820:51820/udp"
     volumes:
       - /var/run/wireguard:/var/run/wireguard

lib/main.dart

@@ -10,6 +10,7 @@ import 'package:waylume_server/services/server_service.dart';
 import 'package:waylume_server/services/wireguard_service.dart';
 import 'package:waylume_server/core/utils.dart';
 import 'package:waylume_server/web/peer_routes.dart';
+import 'package:waylume_server/config/supabase_config.dart';
 
 Middleware requestLogger() {
   return (Handler innerHandler) {