build: install latest gosu from published image (#3717)

scripts/start

@@ -48,7 +48,7 @@ if ! isTrue "${SKIP_SUDO:-false}" && [ "$(id -u)" = 0 ]; then
     echo 'hosts: files dns' > /etc/nsswitch.conf
   fi
 
-  exec $(getSudoFromDistro) ${runAsUser}:${runAsGroup} "$(dirname "$0")/start-configuration" "$@"
+  exec gosu ${runAsUser}:${runAsGroup} "$(dirname "$0")/start-configuration" "$@"
 else
   exec "$(dirname "$0")/start-configuration" "$@"
 fi

scripts/start-utils

@@ -121,17 +121,6 @@ function log() {
   eval "$oldState"
 }
 
-function getSudoFromDistro(){
-  distro=$(getDistro)
-  command=
-  if [[ $distro == alpine ]]; then
-    command="su-exec"
-  else
-    command="gosu"
-  fi
-  echo $command
-}
-
 # Refer to https://unix.stackexchange.com/a/10065/102376
 function isTerminal() {
   if test -t 1; then