Revert "Remove old stuff"

This reverts commit b9fdd96ece.

deployment/old/linux-x64/Dockerfile

@@ -0,0 +1,37 @@
+FROM debian:10
+# Docker build arguments
+ARG SOURCE_DIR=/jellyfin
+ARG PLATFORM_DIR=/jellyfin/deployment/linux-x64
+ARG ARTIFACT_DIR=/dist
+ARG SDK_VERSION=3.1
+# Docker run environment
+ENV SOURCE_DIR=/jellyfin
+ENV ARTIFACT_DIR=/dist
+ENV DEB_BUILD_OPTIONS=noddebs
+ENV ARCH=amd64
+
+# Prepare Debian build environment
+RUN apt-get update \
+ && apt-get install -y apt-transport-https debhelper gnupg wget devscripts mmv libc6-dev libcurl4-openssl-dev libfontconfig1-dev libfreetype6-dev libssl-dev libssl1.1 liblttng-ust0
+
+# Install dotnet repository
+# https://dotnet.microsoft.com/download/linux-package-manager/debian9/sdk-current
+RUN wget https://download.visualstudio.microsoft.com/download/pr/d731f991-8e68-4c7c-8ea0-fad5605b077a/49497b5420eecbd905158d86d738af64/dotnet-sdk-3.1.100-linux-x64.tar.gz -O dotnet-sdk.tar.gz \
+ && mkdir -p dotnet-sdk \
+ && tar -xzf dotnet-sdk.tar.gz -C dotnet-sdk \
+ && ln -s $( pwd )/dotnet-sdk/dotnet /usr/bin/dotnet
+
+# Install yarn package manager
+RUN wget -q -O- https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - \
+ && echo "deb https://dl.yarnpkg.com/debian/ stable main" > /etc/apt/sources.list.d/yarn.list \
+ && apt update \
+ && apt install -y yarn
+
+# Link to docker-build script
+RUN ln -sf ${PLATFORM_DIR}/docker-build.sh /docker-build.sh
+
+VOLUME ${ARTIFACT_DIR}/
+
+COPY . ${SOURCE_DIR}/
+
+ENTRYPOINT ["/docker-build.sh"]