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Update Dockerfile: link with Docker Hub (automated build), download auto and cmake snort, and snort-extra files into separate folders

Update Dockerfile: add snort dependencies libsafec, Ragel, Boost, Hyperscan, DAQ (2.2.1) based on https://sublimerobots.com/2017/07/installing-snort-3-b237-in-ubuntu

Update Dockerfile: add snort dependencies openssl, LuaJIT, hwloc, libdnet, netmap (comment) and DAQ, Snort++