package: create debian package with prebuilds

The generated variants include raspi and non-raspi platforms.

.github/ci/Dockerfile

@@ -0,0 +1,38 @@
+ARG DOCKER_ARCH
+ARG DEBIAN_VERSION
+FROM ${DOCKER_ARCH}debian:${DEBIAN_VERSION} as build_env
+
+# Default packages
+RUN apt-get -y update && apt-get -y install gnupg2 build-essential xxd cmake ccache git-core pkg-config \
+  libavformat-dev libavutil-dev libavcodec-dev libssl-dev v4l-utils
+RUN apt-get -y install debhelper
+
+# Add RPI packages
+ARG DEBIAN_VERSION
+ARG BUILD_TYPE="generic"
+RUN [ "$BUILD_TYPE" != "raspi" ] || \
+  ( \
+    echo "deb http://archive.raspberrypi.org/debian/ $DEBIAN_VERSION main" > /etc/apt/sources.list.d/raspi.list && \
+    apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 82B129927FA3303E && \
+    apt-get -y update && \
+    apt-get -y install libcamera-dev liblivemedia-dev \
+  )
+
+FROM build_env as build
+ADD / /src
+WORKDIR /src
+RUN git clean -ffdx
+RUN git submodule update --init --recursive --recommend-shallow
+RUN git submodule foreach --recursive git clean -ffdx
+
+FROM build as deb_make
+ARG GIT_VERSION
+ARG BUILD_TYPE="generic"
+ENV DEB_BUILD_PROFILES="$BUILD_TYPE"
+
+RUN apt-get build-dep -y $PWD
+RUN . /etc/os-release && \
+  export RELEASE_SUFFIX="$VERSION_CODENAME" && \
+  dpkg-buildpackage -us -uc -b
+
+RUN mkdir -p /deb && mv ../*.deb /deb/