diff --git a/generate-stackbrew-library.sh b/generate-stackbrew-library.sh
index 5a30019..348bfaa 100755
--- a/generate-stackbrew-library.sh
+++ b/generate-stackbrew-library.sh
@@ -1,126 +1,185 @@
-#!/bin/bash
-set -eu
-
-# Latest available version based on https://downloads.joomla.org/technical-requirements
-defaultPhpVersion='php7.3'
-defaultVariant='apache'
+#!/usr/bin/env bash
+set -Eeuo pipefail
 
 self="$(basename "$BASH_SOURCE")"
 cd "$(dirname "$(readlink -f "$BASH_SOURCE")")"
 
-phpVersions=( php*.*/ )
-phpVersions=( "${phpVersions[@]%/}" )
+if [ "$#" -eq 0 ]; then
+  versions="$(jq -r 'keys | map(@sh) | join(" ")' versions.json)"
+  eval "set -- $versions"
+fi
+
+# sort version numbers with highest first
+IFS=$'\n'
+set -- $(sort -rV <<<"$*")
+unset IFS
 
 # get the most recent commit which modified any of "$@"
 fileCommit() {
-	git log -1 --format='format:%H' HEAD -- "$@"
+  git log -1 --format='format:%H' HEAD -- "$@"
 }
 
 # get the most recent commit which modified "$1/Dockerfile" or any file COPY'd from "$1/Dockerfile"
 dirCommit() {
-	local dir="$1"; shift
-	(
-		cd "$dir"
-		fileCommit \
-			Dockerfile \
-			$(git show HEAD:./Dockerfile | awk '
+  local dir="$1"
+  shift
+  (
+    cd "$dir"
+    fileCommit \
+      Dockerfile \
+      $(git show HEAD:./Dockerfile | awk '
 				toupper($1) == "COPY" {
 					for (i = 2; i < NF; i++) {
+						if ($i ~ /^--from=/) {
+							next
+						}
 						print $i
 					}
 				}
 			')
-	)
+  )
 }
 
+gawkParents='
+	{ cmd = toupper($1) }
+	cmd == "FROM" {
+		print $2
+		next
+	}
+	cmd == "COPY" {
+		for (i = 2; i < NF; i++) {
+			if ($i ~ /^--from=/) {
+				gsub(/^--from=/, "", $i)
+				print $i
+				next
+			}
+		}
+	}
+'
+
 getArches() {
-	local repo="$1"; shift
-	local officialImagesUrl='https://github.com/docker-library/official-images/raw/master/library/'
+  local repo="$1"
+  shift
 
-	eval "declare -g -A parentRepoToArches=( $(
-		find -name 'Dockerfile' -exec awk '
-				toupper($1) == "FROM" && $2 !~ /^('"$repo"'|scratch|microsoft\/[^:]+)(:|$)/ {
-					print "'"$officialImagesUrl"'" $2
+  local parentRepoToArchesStr
+  parentRepoToArchesStr="$(
+    find -name 'Dockerfile' -exec gawk "$gawkParents" '{}' + |
+      sort -u |
+      gawk -v officialImagesUrl='https://github.com/docker-library/official-images/raw/master/library/' '
+				$1 !~ /^('"$repo"'|scratch|.*\/.*)(:|$)/ {
+					printf "%s%s\n", officialImagesUrl, $1
 				}
-			' '{}' + \
-			| sort -u \
-			| xargs bashbrew cat --format '[{{ .RepoName }}:{{ .TagName }}]="{{ join " " .TagEntry.Architectures }}"'
-	) )"
+			' |
+      xargs -r bashbrew cat --format '["{{ .RepoName }}:{{ .TagName }}"]="{{ join " " .TagEntry.Architectures }}"'
+  )"
+  eval "declare -g -A parentRepoToArches=( $parentRepoToArchesStr )"
 }
 getArches 'joomla'
 
+# get the Joomla maintainers of these docker images
+joomlaMaintainers="$(jq -cr '. | map(.firstname + " " + .lastname + " <" + .email + "> (@" + .github + ")") | join(",\n             ")' maintainers.json)"
+
 cat <<-EOH
 # this file is generated via https://github.com/joomla-docker/docker-joomla/blob/$(fileCommit "$self")/$self
 
-Maintainers: Harald Leithner <harald.leithner@community.joomla.org> (@HLeithner)
+Maintainers: $joomlaMaintainers
 GitRepo: https://github.com/joomla-docker/docker-joomla.git
 EOH
 
 # prints "$2$1$3$1...$N"
 join() {
-	local sep="$1"; shift
-	local out; printf -v out "${sep//%/%%}%s" "$@"
-	echo "${out#$sep}"
+  local sep="$1"
+  shift
+  local out
+  printf -v out "${sep//%/%%}%s" "$@"
+  echo "${out#$sep}"
 }
 
-for phpVersion in "${phpVersions[@]}"; do
-	for variant in apache fpm fpm-alpine; do
-		dir="$phpVersion/$variant"
-		[ -f "$dir/Dockerfile" ] || continue
+for version; do
+  export version
+  # get this Joomla versions PHP versions
+  phpVersions="$(jq -r '.[env.version].phpVersions | map(@sh) | join(" ")' versions.json)"
+  eval "phpVersions=( $phpVersions )"
+  # get this Joomla versions default PHP version
+  defaultPhpVersion="$(jq -r '.[env.version].php' versions.json)"
+  # get this Joomla versions variants
+  variants="$(jq -r '.[env.version].variants | map(@sh) | join(" ")' versions.json)"
+  eval "variants=( $variants )"
+  # get this Joomla versions default variant
+  defaultVariant="$(jq -r '.[env.version].variant' versions.json)"
+  # get the Joomla versions full version eg: 4.0.0
+  fullVersion="$(jq -r '.[env.version].version' versions.json)"
+  # check if this Joomla version is a Release Candidate
+  rcVersion="${version%-rc}"
+  versionAliases=()
+  while [ "$fullVersion" != "$rcVersion" -a "${fullVersion%[.]*}" != "$fullVersion" ]; do
+    versionAliases+=($fullVersion)
+    fullVersion="${fullVersion%[.]*}"
+  done
+  # get all that aliases of this Joomla version
+  aliases="$(jq -r '.[env.version].aliases | map(@sh) | join(" ")' versions.json)"
+  eval "aliases=( $aliases )"
+  # add the short version an all aliases found
+  versionAliases+=(
+    $version
+    ${aliases[@]:-}
+  )
 
-		commit="$(dirCommit "$dir")"
+  for phpVersion in "${phpVersions[@]}"; do
+    phpVersion="php$phpVersion"
+    for variant in "${variants[@]}"; do
+      dir="$version/$phpVersion/$variant"
+      # check if the docker file exist, else skip
+      [ -f "$dir/Dockerfile" ] || continue
+      # get the commit hash from this docker file
+      commit="$(dirCommit "$dir")"
 
-		fullVersion="$(git show "$commit":"$dir/Dockerfile" | awk '$1 == "ENV" && $2 == "JOOMLA_VERSION" { print $3; exit }')"
-		if [[ "$fullVersion" != *.*.* && "$fullVersion" == *.* ]]; then
-			fullVersion+='.0'
-		fi
+      phpVersionAliases=("${versionAliases[@]/%/-$phpVersion}")
+      phpVersionAliases=("${phpVersionAliases[@]//latest-/}")
 
-		versionAliases=()
-		while [ "${fullVersion%[.-]*}" != "$fullVersion" ]; do
-			versionAliases+=( $fullVersion )
-			fullVersion="${fullVersion%[.-]*}"
-		done
-		versionAliases+=(
-			$fullVersion
-			latest
-		)
+      variantSuffixes=("$variant")
 
-		phpVersionAliases=( "${versionAliases[@]/%/-$phpVersion}" )
-		phpVersionAliases=( "${phpVersionAliases[@]//latest-/}" )
+      variantAliases=()
+      phpVersionVariantAliases=()
+      for variantSuffix in "${variantSuffixes[@]}"; do
+        variantAliases+=("${versionAliases[@]/%/-$variantSuffix}")
+        phpVersionVariantAliases+=("${phpVersionAliases[@]/%/-$variantSuffix}")
+      done
+      variantAliases=("${variantAliases[@]//latest-/}")
+      phpVersionVariantAliases=("${phpVersionVariantAliases[@]//latest-/}")
 
-		variantAliases=( "${versionAliases[@]/%/-$variant}" )
-		variantAliases=( "${variantAliases[@]//latest-/}" )
+      fullAliases=()
+      if [ "$phpVersion" = "php$defaultPhpVersion" ] && [ "$variant" = "$defaultVariant" ]; then
+        fullAliases+=("${versionAliases[@]}")
+        fullAliases+=("${variantAliases[@]}")
+        fullAliases+=("${phpVersionAliases[@]}")
+      fi
+      fullAliases+=("${phpVersionVariantAliases[@]}")
 
-		phpVersionVariantAliases=( "${versionAliases[@]/%/-$phpVersion-$variant}" )
-		phpVersionVariantAliases=( "${phpVersionVariantAliases[@]//latest-/}" )
+      variantParents="$(gawk "$gawkParents" "$dir/Dockerfile")"
+      variantArches=
+      for variantParent in $variantParents; do
+        parentArches="${parentRepoToArches[$variantParent]:-}"
+        if [ -z "$parentArches" ]; then
+          continue
+        elif [ -z "$variantArches" ]; then
+          variantArches="$parentArches"
+        else
+          variantArches="$(
+            comm -12 \
+              <(xargs -n1 <<<"$variantArches" | sort -u) \
+              <(xargs -n1 <<<"$parentArches" | sort -u)
+          )"
+        fi
+      done
 
-		fullAliases=()
-
-		if [ "$phpVersion" = "$defaultPhpVersion" ]; then
-			fullAliases+=( "${variantAliases[@]}" )
-
-			if [ "$variant" = "$defaultVariant" ]; then
-				fullAliases+=( "${versionAliases[@]}" )
-			fi
-		fi
-
-		fullAliases+=(
-			"${phpVersionVariantAliases[@]}"
-		)
-
-		if [ "$variant" = "$defaultVariant" ]; then
-			fullAliases+=( "${phpVersionAliases[@]}" )
-		fi
-
-		variantParent="$(awk 'toupper($1) == "FROM" { print $2 }' "$dir/Dockerfile")"
-		variantArches="${parentRepoToArches[$variantParent]}"
-
-		echo
-		cat <<-EOE
-			Tags: $(join ', ' "${fullAliases[@]}")
-			Architectures: $(join ', ' $variantArches)
-			GitCommit: $commit
-			Directory: $dir
-		EOE
-	done
+      echo
+      cat <<-EOE
+				Tags: $(join ', ' "${fullAliases[@]}")
+				Architectures: $(join ', ' $variantArches)
+				GitCommit: $commit
+				Directory: $dir
+			EOE
+    done
+  done
 done