build image

docker build -t flask-api .

start container from image

docker run -d -p 5000:5000 --name flask-api flask-api

start container from image, when connecting exterl db outside this container

docker run -d -p 5000:5000 -e DB_URI='host.docker.internal' --name flask-api flask-api

start postgres

docker run -d -e POSTGRES_USER='user'
-e POSTGRES_PASSWORD='pass'
-e POSTGRES_DB='dbname'
-p 5432:5432 --name postgres postgres:latest

modify python file on hot container

docker cp ./app.py flask-api:/usr/src/app docker restart flask-api