Default Cobra CMD Setup

internal/config/config.go

@@ -0,0 +1,36 @@
+package config
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+)
+
+// Config is the application configuration loaded from JSON.
+type Config struct {
+	Host string `json:"host"`
+	Port int    `json:"port"`
+}
+
+// Default returns sensible defaults when no config file is used.
+func Default() *Config {
+	return &Config{
+		Host: "127.0.0.1",
+		Port: 8080,
+	}
+}
+
+// Load reads and parses a JSON config file from path.
+func Load(path string) (*Config, error) {
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return nil, fmt.Errorf("read config: %w", err)
+	}
+
+	cfg := Default()
+	if err := json.Unmarshal(data, cfg); err != nil {
+		return nil, fmt.Errorf("parse config: %w", err)
+	}
+
+	return cfg, nil
+}