feat: initialize Go module and add main application entry point

- Add go.mod with required dependencies (Gin, GORM, PostgreSQL driver)
- Create main.go with Gin router, CORS, sessions, and database initialization
- Configure health check endpoint and auth route registration

main.go

@@ -0,0 +1,56 @@
+package main
+
+import (
+	"log"
+	"os"
+
+	"github.com/gin-contrib/cors"
+	"github.com/gin-contrib/sessions"
+	"github.com/gin-contrib/sessions/cookie"
+	"github.com/gin-gonic/gin"
+	"github.com/joho/godotenv"
+
+	"github.com/rideaware/rideaware-api/config"
+	"github.com/rideaware/rideaware-api/models"
+	"github.com/rideaware/rideaware-api/routes"
+)
+
+func main() {
+	// Load environment variables
+	if err := godotenv.Load(); err != nil {
+		log.Println("No .env file found")
+	}
+
+	// Initialize database
+	db := config.InitDB()
+
+	// Auto migrate models
+	if err := db.AutoMigrate(&models.User{}, &models.UserProfile{}); err != nil {
+		log.Fatal("Failed to migrate database:", err)
+	}
+
+	// Initialize Gin router
+	r := gin.Default()
+
+	// CORS middleware
+	r.Use(cors.Default())
+
+	// Session middleware
+	store := cookie.NewStore([]byte(os.Getenv("SECRET_KEY")))
+	r.Use(sessions.Sessions("session", store))
+
+	// Health check endpoint
+	r.GET("/health", func(c *gin.Context) {
+		c.String(200, "OK")
+	})
+
+	// Register auth routes
+	routes.RegisterAuthRoutes(r, db)
+
+	// Start server
+	port := os.Getenv("PORT")
+	if port == "" {
+		port = "8080"
+	}
+	r.Run(":" + port)
+}