serg1557733/nixchat: chat on express js socket io and mongodb, client -React js

serg155alternate 7c0f266678 test backend and database		2 lat temu
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cli-options.js	7c0f266678 test backend and database	2 lat temu
env-options.js	7c0f266678 test backend and database	2 lat temu
main.js	7c0f266678 test backend and database	2 lat temu