Docker basics

Dockerfile

FROM python:3
# From here: https://hub.docker.com/_/python
# Python preinstalled
# You can use any image from docker hub

WORKDIR /usr/src/app

COPY my_file.py ./
# Copy any file or directory here if needed.

RUN echo "Run any shell command here"
# like apt-get install
# pip install etc.

CMD [ "python", "./my_file.py" ]

Terminal

# Install docker in your local machine

# Save the above Dockerfile in local
# In the same directory run the following to build your docker image

docker build -t my-python-app:latest .
# This will build and save image in local with image name my-python-app and tag latest

# Now you can run the container from that image by using following command
docker run -it my-python-app:latest

# At runtime you can
#  - mount local folders into container using -v flag
#  - expose port into host machine using -p flag
#  - run in detached mode using -d flag
#  etc