Commits on Aug 9, 2021

1. Better diagnostics and self-healing of docker-compose …

   There are several ways people might get the quick-start
   docker-compose running messed up (especially on linux):
   
   1) they do not run initialization steps and run docker-compose-up
   2) they do not run docker-compose-init first
   
   Also on MacOS/Windows default memory/disk settings are not
   enough to run Airflow via docker-compose and people are reporting
   "Airflow not working" where they simply do not allocate enough
   resources.
   
   Finally the docker compose does not support all versions of airflow
   and various problems might occur when you use this
   docker compose with old version of airflow.
   
   This change adds the following improvements:
   
   * automated check of minimum version of airflow supported
   * mkdir -p in the directories creation in instructions
   * automated checking if AIRFLOW_UID has been set (and printing
     error and instruction link in case it is not)
   * prints warning about too-low memory, cpu, disk allocation
     and instruction link where to read about it
   * automated fixing of ownership of the directories created in
     case they were not created initially and ended up owned by
     root user

   

   potiuk committed Aug 9, 2021
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