Update docker-entrypoint.sh to match latest version

[RTann]

docker-library/postgres#964

[ghost]

Images are ready for the commit at d8f27ff.

To use the images, use the tag 2.26-10-gd8f27ff807.

[openshift-ci]

@RTann: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/e2e-tests	d8f27ff	link	false	/test e2e-tests

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[connorgorman]

@RTann Is this file actually necessary anymore? Like is the functionality useful or can we really slim it down to exactly what we need

[RTann]

@RTann Is this file actually necessary anymore? Like is the functionality useful or can we really slim it down to exactly what we need

I'm definitely no expert on what is 100% required vs good to have, but I think keeping this file as-is is good. If I started deleting stuff, I don't really know what effects it may have. I'd rather just keep it as-is