feat(m1): backend scaffold - entries CRUD, start/stop, auth, migrations

internal/config/config.go

@@ -0,0 +1,45 @@
+package config
+
+import (
+	"fmt"
+	"os"
+)
+
+// Config holds runtime configuration loaded from environment variables.
+type Config struct {
+	AuthToken string
+	Port      string
+	DBPath    string
+	Timezone  string
+}
+
+// Load reads configuration from environment variables, returning an error if
+// required variables are missing.
+func Load() (*Config, error) {
+	token := os.Getenv("AUTH_TOKEN")
+	if token == "" {
+		return nil, fmt.Errorf("AUTH_TOKEN environment variable is required")
+	}
+
+	port := os.Getenv("PORT")
+	if port == "" {
+		port = "8080"
+	}
+
+	dbPath := os.Getenv("DB_PATH")
+	if dbPath == "" {
+		dbPath = "wotra.db"
+	}
+
+	tz := os.Getenv("TZ")
+	if tz == "" {
+		tz = "UTC"
+	}
+
+	return &Config{
+		AuthToken: token,
+		Port:      port,
+		DBPath:    dbPath,
+		Timezone:  tz,
+	}, nil
+}