BRE-917 Update to Alpine base (#5976)

* testing-wolfi

* testing alpine

* fix gosu download

* fix Admin dockerfile

* update dockerfiles

* alpine-compatible-entrypoint-script-for-api-test

* make-entrypoint-scripts-alpine-compatible

* testing nginx with alpine

* cleaning up comments from dockerfile from testing

* restore accidentally deleted icon

* remove unused file

* pin alpine, update apk add no cache

* remove comments from testing

* test shadow implementtaion for entrypoints

* add shadow package, revert entrypoints, change from bash to shell for entry

* add icu to setup container, update helpers to use shell

* update migrator utility

* add missing krb5 libraries

util/Nginx/entrypoint.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 # Setup