Failed to connect to your instance after deploying mern app on aws ec2 instance when i try to access frontend

Question

i dockerized my mern app (Next js, node js , mongodb) and trying to deploy it on aws ec2 instance. when i try to access my backend on port 5000 via aws public ip then it works fine when i try to access frontend then terminal stuck and if i try to reload the terminal then ssh gives error. this is error i am seeing if i try to reload the terminal: Failed to connect to your instance Error establishing SSH connection to your instance. Try again later. then i have to stop the instance and start the instance. then again backend works fine and when try to access frontend it gives error. this is my folder structure looks like

myecommerce folder then it have two more folders backend frontend nginx (nginx have two files one is dockerfile and second is nginx.conf) docker-compose.yml

this is how my nginx docker file looks like

FROM nginx:latest


RUN rm /etc/nginx/conf.d/*

COPY ./nginx.conf /etc/nginx/conf.d/

CMD [ "nginx", "-g", "daemon off;" ]

this is how my nginx.conf file looks like

events {}

http {
    server {
        listen 80;
        server_name here my aws public ip;

        location / {
            root /usr/share/nginx/html;
            index index.html index.htm;
            try_files $uri $uri/ /index.html;
        }
    }
}

this is my frontend folder docker file

FROM node:20-alpine

WORKDIR /app

COPY package*.json ./

RUN npm install

COPY . .

EXPOSE 3000

CMD npm run dev

this is my backend folder docker file

FROM node:20-alpine

RUN npm install -g nodemon


WORKDIR /app

COPY package*.json ./
RUN npm install

COPY . .

EXPOSE 5000

CMD ["npm", "run", "dev"]

this is how my docker-compose.yml looks like

version: '3'
services:
  frontend:
    image: my frontend image from docker hub
    ports:
      - "3000:3000"

  backend:
    image:my backend image from dockerhub
    ports:
      - "5000:5000"

  nginx:
    image: my nginx image from dockerhub
    ports:
      - "80:80"

later i want to setup github ci cd pipelines for it and using custom domain to access the website later. i am not sure if i am using docker-compose i still need to setup pm2. i am also posting my inbound rules i dont know why frontend is not working. guys i am beginner in aws deployment and dockerization. i am improving my skills please help me i am stuck in this from many days i saw alot of videos and watched multiple videos but not a single article or video doing what i am actually trying to do. Thanks in advance