Test Node.js Docker container

hello-node.Dockerfile

ARG BASE_IMAGE=node:lts-alpine
FROM $BASE_IMAGE
WORKDIR /src
ENV HOST=0.0.0.0 PORT=8080
RUN echo $'\
"use strict";\n\
const http = require("http");\n\
const server = http.createServer((request, response) => {\n\                       response.writeHead(200, {"Content-Type": "text/plain"});\n\
  response.end("Hello, World!");\n\
});\n\
server.listen({\n\
  host: process.env.HOST,\n\
  port: process.env.PORT,\n\
});\n\
server.on("listening", _ => {\n\
  const { address, port } = server.address();\n\
  console.log(`Running on http://${address}:${port}`);\n\
});\n\
process.on("SIGINT", () => { // Ctrl+C \n\
  console.log(" <Caught Ctrl+C; exiting...>");\n\
  process.exit();\n\
});\n\
process.on("SIGTERM", () => { // docker stop\n\
  console.log(" <Caught kill; exiting...>");\n\
  process.exit();\n\
});\
' | sed "s/\"/'/g" > ./node_server.js

RUN cat ./node_server.js
CMD [ "node", "/src/node_server.js" ]