feat: add frontend prototype

platform/config/config.go

@@ -21,6 +21,7 @@ type Config struct {
 	SupabaseIssuer    string
 	SupabaseJWTSecret string
 	RedisAddr         string
+	AppSiteURL        string
 }
 
 func Load() (Config, error) {
@@ -50,6 +51,7 @@ func Load() (Config, error) {
 		SupabaseIssuer:    os.Getenv("SUPABASE_ISSUER"),
 		SupabaseJWTSecret: os.Getenv("SUPABASE_JWT_SECRET"),
 		RedisAddr:         getenv("REDIS_ADDR", "localhost:6379"),
+		AppSiteURL:        getenv("APP_SITE_URL", "http://localhost:5173"),
 	}, nil
 }