Hello I am trying to deploy my go application, but I keep getting this server error: Application failed to respond

err := godotenv.Load()

if err != nil {

panic(err)

}

server := gin.Default()

port := os.Getenv("PORT")

if port == "" {
	port = "8080"
}

server.Run("0.0.0.0:" + port)

/* .env file */

PORT=8080

I am not sure what to do at this point. thank you for your help. I didn't do any build commands on railway. I just used the default. thank you