Downloading from bleeding edge instead of release. May need to update often

[todo]

datasetu-video-server/images/video-server/Dockerfile

Lines 21 to 26 in f30841d

	# TODO: Downloading from bleeding edge instead of release. May need to update often
	RUN mkdir -p /tmp/build/nginx-rtmp-module && \
	cd /tmp/build/nginx-rtmp-module && \
	wget -O nginx-rtmp-module.tar.gz https://github.com/arut/nginx-rtmp-module/tarball/master && \
	tar -xf nginx-rtmp-module.tar.gz --one-top-level=nginx-rtmp-module --strip-components 1 && \
	cd nginx-rtmp-module

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This issue was generated by todo based on a TODO comment in f30841d when #19 was merged. cc @datasetu.