feat: bootstrap temporserv project scaffold

Add the initial project blueprint, Go backend skeleton, frontend app shell, database schema draft, and local development/deployment files.

internal/config/config.go

@@ -0,0 +1,36 @@
+package config
+
+import "os"
+
+type Config struct {
+	AppEnv       string
+	ServerHost   string
+	ServerPort   string
+	DatabasePath string
+	MediaRoot    string
+	CORSOrigins  string
+}
+
+func Load() Config {
+	return Config{
+		AppEnv:       getenv("APP_ENV", "development"),
+		ServerHost:   getenv("SERVER_HOST", "0.0.0.0"),
+		ServerPort:   getenv("SERVER_PORT", "4040"),
+		DatabasePath: getenv("DATABASE_PATH", "./data/app.db"),
+		MediaRoot:    getenv("MEDIA_ROOT", "./media"),
+		CORSOrigins:  getenv("CORS_ORIGINS", "http://localhost:5173"),
+	}
+}
+
+func (c Config) Address() string {
+	return c.ServerHost + ":" + c.ServerPort
+}
+
+func getenv(key, fallback string) string {
+	value := os.Getenv(key)
+	if value == "" {
+		return fallback
+	}
+	return value
+}
+