Unable to access Go server when hosted on AWS

I have created a project in Go using gin and it is working fine locally. However, when I tried deploying this on an EC2 instance on AWS, I was unable to access the APIs on the server.

I did a ssh into the hosted machine and gave a curl request (curl localhost:8080) and it gave a proper response. But any request from outside is not reachable.

The server is running on port 8080. I have opened the ports in the AWS security groups.

Is there any setting in Go/gin that I need to make for it to be accessible from the internet?

Sample code:

package main

import (
	"myConstants"
	"myDatabase"
	"myMiddleware"
	"onboarding"

	"github.com/gin-gonic/gin"
)

func main() {

	var db = myDatabase.DBConnect()

	router := gin.Default()

	router.Use(myMiddleware.RestrictInputContent)
	router.Use(myMiddleware.CheckToken(db))
	router.Use(myMiddleware.RequestLoggerMiddleware())

	router.POST("/signup", onboarding.Signup(db))
	router.POST("/login", onboarding.Login(db))
	router.POST("/logout", onboarding.Logout(db))
	router.GET("/", onboarding.Hello(db))

	defer db.Close()

	//Listen and serve
	router.Run("127.0.0.1:8080")

}

Changed the router.Run from router.Run("127.0.0.1:8080") to router.Run(":8080") and it works.
As suggested by @elithrar and @user3591723
127.0.0.1 (local host) is only the loop back interface on the machine
Binding to ":8080" means 0.0.0.0:8080 - which means all interfaces