docker build -t simple_api ./simple_api
docker run --name simple_api -d -p 5000:5000 simple_api

If the backend run it should throw an error on http://localhost:5000

Curl the endpoint to get data :

curl -u toto:python -X GET http://127.0.0.1:5000/pozos/api/v1.0/get_student_ages

When you update the index.php url, don't miss the point that your localhost will not work. Docker have an intern localhost and you will need to pass the backend container name instead so it can be automatically recognized.

docker compose up
docker compose down

Just tag your image and push it

docker image tag <name> localhost:5000/<name>
docker image push localhost:5000/<name>