Set Up Jitsi Locally via Docker-compose prerequisites and requirements

I am new to both Docker and Jitsi
I previously asked this question

But after reading some articles and issues posted
I found out that there are some more fundamental things remain vague for me these are my question which might be trivial

  1. Is it possible to set up Jitsi meet on an localhost instead of a real domain name?
    something like: localhost:8000
  2. If it is possible what should be the value of
    PUBLIC_URL in environements?
  3. Is there any prerequisites packages that should be installed before
    example Letsenrypt package
  4. Is it required that we have any web server installed and run before that

Please help me through these question

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