application hellow world on node jd Dockerfile content -->>

Use the official Node.js image

FROM node:14-alpine

Set the working directory

WORKDIR /app

Copy package.json and package-lock.json

COPY package*.json ./

RUN npm cache clean --force

Install dependencies

RUN npm install

Copy application code

COPY . .

Expose port 3000

EXPOSE 3000

Command to run the application

CMD ["node", "app.js"] +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ another files near Dockerfile with same location name file app.js content ==>> const http = require('http');

const hostname = '0.0.0.0'; const port = 3000;

const server = http.createServer((req, res) => { res.statusCode = 200; res.setHeader('Content-Type', 'text/plain'); res.end('Hello, World!\n'); });

server.listen(port, hostname, () => { console.log(Server running at http://${hostname}:${port}/); });

tomcat hosting with dockerfile content-->

FROM centos:7

LABEL author "ranjit"

ADD https://dlcdn.apache.org/tomcat/tomcat-8/v8.5.99/bin/apache-tomcat-8.5.99.tar.gz .

RUN tar -xvf apache-tomcat-8.5.99.tar.gz -C /opt

RUN yum install -y epel-release

RUN yum install -y java-11-openjdk-devel

WORKDIR /opt/apache-tomcat-8.5.99/webapps/

ADD https://s3-us-west-2.amazonaws.com/studentapi-cit/student.war .

EXPOSE 8080

CMD ["/opt/apache-tomcat-8.5.99/bin/catalina.sh", "run"]

#---------------------------------------------------------------- nginx hosting on dockerfile-->

FROM ubuntu

RUN apt update

RUN apt install -y unzip

RUN apt install -y nginx

ADD https://www.free-css.com/assets/files/free-css-templates/download/page293/chocolux.zip .

RUN unzip chocolux.zip

RUN cp chocolux-html /usr/share/nginx/html/index.html

RUN systemctl enable nginx

RUN systemctl start nginx

EXPOSE 80

CMD [ "nginx","-D", "FOREGROUND" ]