CUB-181: Scaffold Go module, directory layout, config, and main.go entry point

cmd/server/main.go

@@ -0,0 +1,75 @@
+// Package main is the entry point for the RemoteRig central hub.
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"time"
+
+	"gopkg.in/yaml.v3"
+)
+
+// Config holds the application configuration.
+type Config struct {
+	DBPath       string        `yaml:"db_path"`
+	APIKey       string        `yaml:"api_key"`
+	Port         string        `yaml:"port"`
+	ReadTimeout  time.Duration `yaml:"read_timeout"`
+	WriteTimeout time.Duration `yaml:"write_timeout"`
+	IdleTimeout  time.Duration `yaml:"idle_timeout"`
+	MQTT         struct {
+		Broker   string `yaml:"broker"`
+		ClientID string `yaml:"client_id"`
+	} `yaml:"mqtt"`
+	Platform struct {
+		Type        string `yaml:"type"`
+		MaxCameras  int    `yaml:"max_cameras"`
+	} `yaml:"platform"`
+}
+
+func main() {
+	log.Println("RemoteRig hub starting...")
+
+	// Load config
+	cfg, err := loadConfig("config.yaml")
+	if err != nil {
+		log.Fatalf("Failed to load config: %v", err)
+	}
+
+	// Print config
+	log.Printf("Database: %s", cfg.DBPath)
+	log.Printf("API key set: %t", cfg.APIKey != "")
+	log.Printf("Server port: %s", cfg.Port)
+	log.Printf("MQTT broker: %s", cfg.MQTT.Broker)
+	log.Printf("Platform: %s (max %d cameras)", cfg.Platform.Type, cfg.Platform.MaxCameras)
+
+	log.Println("RemoteRig hub ready")
+}
+
+func loadConfig(path string) (*Config, error) {
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return nil, fmt.Errorf("read config file: %w", err)
+	}
+
+	var cfg Config
+	if err := yaml.Unmarshal(data, &cfg); err != nil {
+		return nil, fmt.Errorf("parse config: %w", err)
+	}
+
+	if cfg.Port == "" {
+		cfg.Port = "8080"
+	}
+	if cfg.DBPath == "" {
+		cfg.DBPath = "remoterig.db"
+	}
+	if cfg.MQTT.Broker == "" {
+		cfg.MQTT.Broker = "localhost:1883"
+	}
+	if cfg.MQTT.ClientID == "" {
+		cfg.MQTT.ClientID = "remoterig-hub"
+	}
+
+	return &cfg, nil
+}