Always have a “.dockerignore” and always have “.git” in it

Without “.dockerignore” the whole directory where Dockerfile is in will be sent to docker daemon, which may be huge

And always create a “.git” entry in the file, because this directory can be very big.

P.S. Failling to do this may lead to the hanging of “docker-compose up”. It will show the following message: Sending auth config ('')

You will wonder what’s wrong with your network, but the truth is that your context is too big.

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