feat: add feature based structure

cmd/api/main.go

@@ -0,0 +1,34 @@
+package main
+
+import (
+	"context"
+	"log"
+
+	"github.com/gin-gonic/gin"
+	"github.com/jackc/pgx/v5"
+
+	user "tutorial.sqlc.dev/app/internal/author"
+)
+
+func run() error {
+	ctx := context.Background()
+
+	conn, err := pgx.Connect(ctx, "postgres://postgres:supersecretpassword@localhost:5432/sqlc_tutorial")
+	if err != nil {
+		return err
+	}
+	defer conn.Close(ctx)
+
+	r := gin.Default()
+	userCtl := user.NewController(conn)
+	user.Register(r, &userCtl)
+
+	r.Run(":8000")
+	return nil
+}
+
+func main() {
+	if err := run(); err != nil {
+		log.Fatal(err)
+	}
+}