Container not working as expected

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I have a Dot net application when run locally it launches on url http://localhost:59901, and I am trying to dockerize this application. below is the docker file, I have pulled all the dependent images before these line in docker file.

ENV DOTNET_URLS=http://+:80
COPY bin/Release/netcoreapp2.1/publish/ /opt/Pcit/common
WORKDIR /opt/Pcit/common
ENTRYPOINT ["./pcit/common"]
EXPOSE 8080

have build the docker Image using this command

Docker build -t common:v1 .

and below command to run container

Docker run -p 8080:8080 imageid

in the Docker desktop I see the container is listening to http://localhost/5000, which I have not declared anywhere
and when I try to browse, its not working as expected

I am confused by how these ports work and how I can make this container work.

Please help. Thanks in Advance.

What I have tried:

<pre>ENV DOTNET_URLS=http://+:80
COPY bin/Release/netcoreapp2.1/publish/ /opt/Pcit/common
WORKDIR /opt/Pcit/common
ENTRYPOINT ["./pcit/common"]
EXPOSE 8080

<pre>Docker build -t common:v1 .

<pre>Docker run -p 8080:8080 imageid

Posted 22-May-23 0:31am

ashu1810

Updated 22-May-23 1:34am

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Andre Oosthuizen · Answer 1 · 2023-05-22T01:34:00

"EXPOSE 8080" indicates that the application will listen for incoming network traffic on port 8080.

When running on localhost, you had :59901 port listening in, this means that you have another application that already makes use of port 8080, change the port number or stop the other application.

To see what app is using what port -
On MS Windows, select Start > All Programs > Accessories > System Tools >Resource Monitor

Expand the Network Tab

Move to the section for Listening Ports

Look in the Port column and scroll to find entry for port 8080

Select the given process and delete/kill the process or change your app port number.

As a side note, note that merely exposing a port in the container doesn't automatically make it accessible. You would still need to configure network bindings and firewall rules to allow inbound traffic to reach the container's exposed port.