Can't send request on running docker image. Error socket hang up in postman. In browser localhost didn't send any data

Question

I locally launched docker image successfully but i can't send any request on localhost.I have errors socket hang up in postman and localhost didn't send any data.

docker file

FROM node:20-alpine

MAINTAINER Some Dev

RUN mkdir /app
WORKDIR /app

COPY ./backend /app

RUN npm i

CMD ["npm","start"]

app.ts and small rout that I'm trying to reach configs.PORT = 5000 configs.HOST = 0.0.0.0

app.get('/hello',async (req:Request,res:Response,next:NextFunction)=>{
   res.json("Hello")
})

const startServer = async () => {
  try {
    await mongoose.connect(configs.DB_URL);
    console.log("Connected to MongoDB");

      app.listen(+configs.PORT, configs.HOST,() =>{
          console.log(`Server listening on ${configs.PORT} and host ${configs.HOST}`);
      })

  } catch (err) {
    throw new ApiError(err.message, err.status);
  }
};

startServer();

docker build -t buxonlineappv2 .

docker run -d -p 5555:80 buxonlineappv2

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 6fd90778e2df buxonlineappv2 "docker-entrypoint.s…" 51 seconds ago Up 39 seconds 0.0.0.0:5555->80/tcp jolly_saha

In first i added host 0.0.0.0. Tried different ports. Tried localhost:5555/hello 0.0.0.0:5555/hello http:localhost:5555/hello

Answer 1

since your server is listening on port 5000, you should run this command to run the container:

docker run -d -p 5555:5000 buxonlineappv2

so that 5555 port on host maps with 5000 port in container.