docker specify dockerfile code example

Example 1: docker build

docker build -t [tag] .

Example 2: docker expose port

docker run -p [external]:[Internal]

#example (will open in localhost:8080 to container port 80)
docker run -p 8080:80

Example 3: how to create docker image from custom filename

cat DockerFile.debian.foo | docker build -t debian.foo -

Example 4: create dockerfile

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

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