Configuring the Dockerfile with CMake

First, and foremost, we'll need a Dockerfile. Let's use yet another CMake input file for this:

configure_file(${CMAKE_CURRENT_SOURCE_DIR}/Dockerfile.in
                ${PROJECT_BINARY_DIR}/Dockerfile @ONLY)

Note that we're using PROJECT_BINARY_DIR to not overwrite any Dockerfiles created by other projects in the source tree if our project is part of a bigger one.

Our Dockerfile.in file will look as follows:

FROM ubuntu:latest
ADD Customer-@[e-mail] .
RUN apt-get update && \
    apt-get -y --no-install-recommends install ./Customer-@[e-mail] && \
    apt-get autoremove -y && \
    apt-get clean && \
    rm -r /var/lib/apt/lists/* Customer-@[e-mail]
ENTRYPOINT ["/usr/bin/customer"]
EXPOSE 8080

First, we specify that we'll take the latest Ubuntu image, install our DEB package on it along with its dependencies, and then tidy...