Add github release creation

ci/release-image/.gitignore

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+code-server*.tar.gz

ci/release-image/Dockerfile

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+FROM debian:10
+
+RUN apt-get update
+RUN apt-get install -y curl
+
+COPY code-server*.tar.gz /tmp
+RUN cd /tmp && tar -xzf code-server*.tar.gz && \
+  cp code-server*/code-server /usr/local/bin/code-server
+RUN rm -rf /tmp/*
+
+# https://wiki.debian.org/Locale#Manually
+RUN apt-get install -y locales
+RUN sed -i "s/# en_US.UTF-8/en_US.UTF-8/" /etc/locale.gen
+RUN locale-gen
+ENV LANG=en_US.UTF-8
+
+RUN chsh -s /bin/bash
+ENV SHELL=/bin/bash
+
+RUN apt-get install -y dumb-init sudo
+RUN apt-get install -y man procps vim nano htop ssh git
+
+RUN adduser --gecos '' --disabled-password coder && \
+	echo "coder ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers.d/nopasswd
+
+RUN curl -SsL https://github.com/boxboat/fixuid/releases/download/v0.4/fixuid-0.4-linux-amd64.tar.gz | tar -C /usr/local/bin -xzf - && \
+    chown root:root /usr/local/bin/fixuid && \
+    chmod 4755 /usr/local/bin/fixuid && \
+    mkdir -p /etc/fixuid && \
+    printf "user: coder\ngroup: coder\n" > /etc/fixuid/config.yml
+
+RUN rm -rf /var/lib/apt/lists/*
+EXPOSE 8080
+USER coder
+WORKDIR /home/coder
+ENTRYPOINT ["dumb-init", "fixuid", "-q", "code-server", "--host", "0.0.0.0"]