issue2551147 - Enable compression of http responses in roundup. gzip, (brotli/zstd with optional packages) on the fly compression/content-encoding enabled by default. Can serve pre-compressed static assets as well if the client can accept it. Docs updated. Also added example nginx config to installation.txt. The config allows nginx to compress data on the fly. If the config is used, dynamic compression in roundup can be disabled. Dedicating this checkin to my father Paul Hector Rouillard 1930-2021. I did much of the development in this changeset while sitting with him as he slept/transitioned. Without his encouragement and example, my desire to learn would not be what it is and I wouldn't be half the person I am.