Dockerfile

# Dockerfile, Image, Container

# base image
FROM python:3

# work envornment variable
ENV DockerHOME=/home/app/webapp

# work directory
RUN mkdir -p $DockerHOME 

# where the code will be contained
WORKDIR ${DockerHOME}

# environment variables  
ENV PYTHONDONTWRITEBYTECODE 1
ENV PYTHONUNBUFFERED 1  

# update pip to the latest version
RUN pip install --upgrade pip 

# copy whole project to your docker home directory. 
COPY . $DockerHOME

# run this command to install all dependencies  
RUN pip install -r requirements.txt  

# port where the Django app runs  
EXPOSE 8000  

# CMD command for the docker image
CMD [ "python3", "manage.py", "runserver", "0.0.0.0:8000" ]

# Command to build container using docker: 
# docker build -t image_name .

# Get images:
# docker image ls

# Command to start container:
# docker run container_name image_name 
# or docker run -t -i image_name when user input is needed

# !! Running an image with porting is needed, therefore use the command:
# docker run -d -p 8000:8000 image_name

# Get containers:
# docker container ls

# Container execution command:
# docker exec -i -t container_id command