Initial commit: ozon-mock Go server

- Mock Ozon Seller API endpoints
- Products, Postings, Finance, Returns, Analytics
- JSON fixtures for testing
- Docker support
- Gitea Actions CI/CD

internal/config/config.go

@@ -0,0 +1,24 @@
+package config
+
+import "os"
+
+type Config struct {
+	Port     string
+	ClientID string
+	APIKey   string
+}
+
+func Load() *Config {
+	return &Config{
+		Port:     getEnv("PORT", "8080"),
+		ClientID: os.Getenv("OZON_CLIENT_ID"),
+		APIKey:   os.Getenv("OZON_API_KEY"),
+	}
+}
+
+func getEnv(key, defaultVal string) string {
+	if val := os.Getenv(key); val != "" {
+		return val
+	}
+	return defaultVal
+}