Dockerfile code example

Example 1: docker ARG

$ docker build --build-arg some_variable_name=a_value

Example 2: dockerfile example

FROM ubuntu:18.04
COPY . /app
RUN make /app
CMD python /app/app.py

Example 3: docker file

# getting base image from ubuntu
FROM ubuntu:18.04

RUN apt-get update

CMD ["echo", "HEY from docker image"]

Example 4: dockerfile run app cmd

RUN apt-get install python3
CMD echo "Hello world"
ENTRYPOINT echo "Hello world"