[docs] fix trailing slash problem

.dockerignore

@@ -48,4 +48,7 @@ tmp/
 
 # Ignore build and deployments directories
 deployments/
-build/
+build/
+
+# Example requests files
+*.http

internal/sms-gateway/handlers/root.go

@@ -9,6 +9,14 @@ type rootHandler struct {
 }
 
 func (h *rootHandler) Register(app *fiber.App) {
+	app.Use(func(c *fiber.Ctx) error {
+		if c.Path() == "/api" {
+			return c.Redirect("/api/", fiber.StatusMovedPermanently)
+		}
+
+		return c.Next()
+	})
+
 	h.healthHandler.Register(app)
 	app.Static("/api", "api")
 }