first commit

Dockerfile

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+FROM ubuntu:bionic AS build
+COPY uml.config /uml.config
+ENV LINUX_VERSION linux-4.19.57
+ENV LINUX_DOWNLOAD_URL https://cdn.kernel.org/pub/linux/kernel/v4.x/${LINUX_VERSION}.tar.xz
+RUN apt-get update \
+ && apt-get -y install build-essential flex bison xz-utils wget ca-certificates bc linux-headers-4.15.0-47-generic \
+ && wget ${LINUX_DOWNLOAD_URL} \
+ && tar xJf ${LINUX_VERSION}.tar.xz \
+ && rm ${LINUX_VERSION}.tar.xz \
+ && cd ${LINUX_VERSION} \
+ && cp /uml.config .config \
+ && make ARCH=um -j10 \
+ && mv ./linux / \
+ && cd .. \
+ && rm -rf ${LINUX_VERSION}
+
+FROM xena/alpine
+
+COPY --from=build /linux /linux
+ADD https://xena.greedo.xeserv.us/files/slirp /slirp
+
+# Add Tini
+ENV TINI_VERSION v0.18.0
+ADD https://github.com/krallin/tini/releases/download/${TINI_VERSION}/tini-static /chroot/tini
+RUN chmod +x /chroot/tini
+
+# Set up chroot
+RUN cd /chroot \
+ && wget -O - http://dl-cdn.alpinelinux.org/alpine/v3.10/releases/x86_64/alpine-minirootfs-3.10.0-x86_64.tar.gz | tar xz \
+ && chmod +x /linux \
+ && chmod +x /slirp
+COPY init.sh /chroot/init.sh
+COPY resolv.conf /chroot/etc/resolv.conf
+
+COPY runlinux.sh /runlinux.sh
+CMD /runlinux.sh