fix: set password to launch postgres container

[potix2]

I fixed all broken tests in CI.

The tests were failed because the testing containers launched without default password.

Related issue

Nothing

Proposed changes

Set a password as an environment variable on launching testing container.

Checklist

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• I confirm that this pull request does not address a security
  vulnerability. If this pull request addresses a security vulnerability, I
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• I have added tests that prove my fix is effective or that my feature works.
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[CLAassistant]

All committers have signed the CLA.

[aeneasr]

Nice, thank you!