ADD: added initial page with login

backend/cmd/server/main.go

@@ -0,0 +1,40 @@
+package main
+
+import (
+	"os"
+	"volleyball/internal/auth"
+	"volleyball/internal/tournament"
+
+	"github.com/gin-contrib/cors"
+	"github.com/gin-gonic/gin"
+)
+
+func main() {
+	r := gin.Default()
+
+	// CORS
+	r.Use(cors.New(cors.Config{
+		AllowOrigins:     []string{"http://localhost:3000"},
+		AllowMethods:     []string{"GET", "POST", "PUT", "DELETE"},
+		AllowHeaders:     []string{"Authorization", "Content-Type"},
+		AllowCredentials: true,
+	}))
+
+	// Public
+	r.POST("/api/login", auth.LoginHandler)
+	r.GET("/api/tournaments", tournament.ListTournaments)
+
+	// Protected API
+	api := r.Group("/api")
+	api.Use(auth.AuthMiddleware())
+
+	api.GET("/tournaments/:id", tournament.GetTournament)
+	api.POST("/tournaments/:id/join", tournament.JoinTournament)
+	api.PUT("/tournaments/:id", tournament.UpdateTournament)
+
+	port := os.Getenv("PORT")
+	if port == "" {
+		port = "8080"
+	}
+	r.Run(":" + port)
+}