Fix hadolint errors and optimise image a bit more (#564)
Fix hadolint errors and optimise image a bit more (#564)

* Fix hadolint errors and optimize image a bit more

* fixup! Fix hadolint errors and optimize image a bit more
KlubJagiellonski/pola-backend,KlubJagiellonski/pola-backend,KlubJagiellonski/pola-backend,KlubJagiellonski/pola-backend