Added syncthing files

syncthing/Dockerfile

@@ -0,0 +1,26 @@
+FROM archlinux
+LABEL maintiner="Mark <mark@betalupi.com>"
+
+# Create users and groups.
+# Make sure uids and gids are the same on the host!
+#
+# Syncthing should be installed AFTER users are created.
+# The package will create its own syncthing user if one does not exist.
+# We need to do it manually, to control uid and gid.
+
+RUN groupadd -g 1000 syncthing && \
+	useradd -g 1000 -u 1000 syncthing -d /stdata && \
+	pacman -Fyy --noconfirm && \
+	pacman -Syu --noconfirm && \
+	pacman -S --noconfirm syncthing syncthing-relaysrv
+
+VOLUME /syncthing
+
+# Syncthing
+EXPOSE 8384
+
+# Relay
+EXPOSE 22067
+
+COPY start.sh /start.sh
+ENTRYPOINT ["/bin/bash", "start.sh"]