How to access the ubuntu server over the browser / expose docker port

Hi, I m trying to access my dockerize app which is following micro service architecture. In my local machine i can access the app on different ports but in the digital ocean droplet i am unable to acess the app. Here is docker-File and docker-compose file configurations. I have 3 services all service having same dockerfile

# pull official base image
FROM node:13.12.0-alpine

# set working directory
WORKDIR /app

# add `/app/node_modules/.bin` to $PATH
ENV PATH /app/node_modules/.bin:$PATH

# install app dependencies
RUN apk add --no-cache git
COPY package.json ./
COPY package-lock.json ./
RUN npm ci

# add app
COPY . ./

# start app
CMD ["npm", "start"]

Here is the main docker-compose file

version: "2.0"
services:
  mfe-host:
    build:
      context: ./host
    ports:
      - "3000:3000"
    container_name: mfe-host
    stdin_open: true
  mfe-nav:
    build:
      context: ./nav
    ports:
      - "3001:3001"
    container_name: mfe-nav
    stdin_open: true
  mfe-store:
    build:
      context: ./store
    ports:
      - "3002:3002"
    container_name: mmfe-store
    stdin_open: true