Docker container Flask Api not responding to Postman request-CodePudding

I am trying to run a Flask API inside a Docker container. After running the container I get the following on terminal-

 * Serving Flask app 'return-nlp' (lazy loading)
 * Environment: production
   WARNING: This is a development server. Do not use it in a production deployment.
   Use a production WSGI server instead.
 * Debug mode: off
 * Running on all addresses.
   WARNING: This is a development server. Do not use it in a production deployment.
 * Running on http://172.17.0.2:3000/ (Press CTRL C to quit)

On sending a POST request on the given URL, I don't get any response. I have also tried sending the same request to http://127.0.0.1:3000/, my own IP Address but I don't get any response from the container and get the two responses on Postman-

Error: connect ECONNREFUSED 127.0.0.1:3000

Error: connect ETIMEDOUT

CodePudding user response：

thanks to @KalusD. for suggesting using the -p option to publish the port on the host machine, this seems to have solved the issue.

we use the -p option to bind the port from the process running in the container to the port on the host machine

--publish , -p Publish a container's port(s) to the host

Check here for more info from the official docs.