Add i386 support

Dockerfile.i386

@@ -0,0 +1,60 @@
+FROM i386/ubuntu:18.04
+
+ARG S6_OVERLAY_VERSION=v2.2.0.3
+ARG S6_OVERLAY_ARCH=x86
+ARG PLEX_BUILD=linux-x86
+ARG PLEX_DISTRO=debian
+ARG DEBIAN_FRONTEND="noninteractive"
+ENV TERM="xterm" LANG="C.UTF-8" LC_ALL="C.UTF-8"
+
+ENTRYPOINT ["/init"]
+
+RUN \
+# Update and get dependencies
+    apt-get update && \
+    apt-get install -y \
+      tzdata \
+      curl \
+      xmlstarlet \
+      uuid-runtime \
+      unrar \
+    && \
+    \
+# Fetch and extract S6 overlay
+    curl -J -L -o /tmp/s6-overlay-${S6_OVERLAY_ARCH}.tar.gz https://github.com/just-containers/s6-overlay/releases/download/${S6_OVERLAY_VERSION}/s6-overlay-${S6_OVERLAY_ARCH}.tar.gz && \
+    tar xzf /tmp/s6-overlay-${S6_OVERLAY_ARCH}.tar.gz -C / && \
+    \
+# Add user
+    useradd -U -d /config -s /bin/false plex && \
+    usermod -G users plex && \
+    \
+# Setup directories
+    mkdir -p \
+      /config \
+      /transcode \
+      /data \
+    && \
+    \
+# Cleanup
+    apt-get -y autoremove && \
+    apt-get -y clean && \
+    rm -rf /var/lib/apt/lists/* && \
+    rm -rf /tmp/* && \
+    rm -rf /var/tmp/*
+
+EXPOSE 32400/tcp 8324/tcp 32469/tcp 1900/udp 32410/udp 32412/udp 32413/udp 32414/udp
+VOLUME /config /transcode
+
+ENV CHANGE_CONFIG_DIR_OWNERSHIP="true" \
+    HOME="/config"
+
+ARG TAG=beta
+ARG URL=
+
+COPY root/ /
+
+RUN \
+# Save version and install
+    /installBinary.sh
+
+HEALTHCHECK --interval=5s --timeout=2s --retries=20 CMD /healthcheck.sh || exit 1