Docker runs only on Port 80-CodePudding

I am unable to run my docker image on Port 4000, even though I can run it on Port 80. What am I doing wrong here?

FROM node:latest as build
WORKDIR /usr/src/app
COPY package*.json ./
RUN npm install
COPY . .
RUN npm run build
FROM nginx:latest
COPY --from=build /usr/src/app/dist/admin /usr/share/nginx/html
EXPOSE 4200

I'm creating the image using the following command:

docker build --pull --rm -f "DockerFile" -t admin1:v1 "."

When I run it on port 80, I'm able to use it:

docker run --rm -d -p 4200:4200/tcp -p 80:80/tcp admin1:v1

However, when I run the following command, I'm unable to use it:

docker run --rm -d -p 4200:4200/tcp -p 4000:4000/tcp admin1:v1

I have researched similar questions online, but I haven't been able to fix the problem. Any suggestion will be greatly appreciated!

CodePudding user response：

You need to map the docker container port to the docker host port.

Try the following Command

docker run --rm -d -p 4200:4200/tcp -p 4000:80/tcp admin1:v1

The following is the extract from the Docker Documentation

-p 8080:80  Map TCP port 80 in the container to port 8080 on the Docker host.

You can refer the link for further information. Docker Documentation