build.sh

npm install express
podman build -t pokusimage .

Dockerfile

FROM node:10-alpine

RUN mkdir -p /src/app
WORKDIR /src/app

COPY package.json /src/app/package.json
RUN npm install
COPY . /src/app

EXPOSE 3000
CMD [ "npm", "start" ]

index.js

const express = require('express')
const app = express()
const port = 3000

app.get('/', (req, res) => res.send('Hello World! ' +  new Date()))

app.listen(port, () => console.log(`My server listening at http://localhost:${port}`))

package.json

{
  "name": "pokus",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "start": "node index.js"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "express": "^4.18.2"
  }
}

run.sh

# https://osric.com/chris/accidental-developer/2018/12/docker-versus-podman-and-iptables/
# iptables -I CNI-FORWARD -p tcp ! -i cni-podman0 -o cni-podman0 -d 10.88.0.0/24 --dport 3000 -j ACCEPT

podman run -p 3000:3000 pokusimage:latest