Add a Dockerfile to build a dev environment and a shell script to run a build.

Dockerfile

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+FROM devkitpro/devkita64
+
+# Add non-privileged build user
+RUN useradd -m -s /bin/bash -G sudo build; passwd -d build
+
+# Install fakeroot and updated git
+RUN echo "deb http://deb.debian.org/debian stretch-backports main" >> /etc/apt/sources.list.d/stretch-backports.list &&\
+    apt-get update &&\
+    apt-get -t stretch-backports -y install git fakeroot
+
+# Install devkitpro-pkgbuild-helpers
+RUN dkp-pacman -S --noconfirm devkitpro-pkgbuild-helpers
+
+COPY build.sh /home/build/build.sh
+
+ENTRYPOINT ["/bin/bash"]

build.sh

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+#!/bin/bash
+
+# Exit with an error code if any of the commands fail
+set -e
+trap 'last_command=$current_command; current_command=$BASH_COMMAND' DEBUG
+trap 'echo "\"${last_command}\" command filed with exit code $?."' EXIT
+
+# Compile and deploy custom libcurl if a PKGBUILD url is set
+if [[ ! -z $LIBCURL_PKGBUILD_URL ]]; then
+    curdir=$(pwd)
+    mkdir switch-libcurl
+    chown ${LIBCURL_BUILD_USER} switch-libcurl
+    cd switch-libcurl
+    wget ${LIBCURL_PKGBUILD_URL}
+    sudo -u ${LIBCURL_BUILD_USER} dkp-makepkg
+    cp -r pkg/switch-curl/opt/devkitpro/portlibs/switch/* /opt/devkitpro/portlibs/switch
+    cd ${curdir}
+fi
+
+# Run build
+make -j NIGHTLY_BUILD=`git rev-parse --short "$GITHUB_SHA"`