Support BASE64 config input to match official image

Author: thespad

root/etc/s6-overlay/s6-rc.d/init-phpmyadmin-config/run

@@ -12,11 +12,19 @@ if [ ! -f /config/phpmyadmin/config.secret.inc.php ]; then
 EOT
 fi
 
-if [ ! -f /config/phpmyadmin/config.user.inc.php ]; then
+if [[ -n "${PMA_CONFIG_BASE64}" ]]; then
+    echo "${PMA_CONFIG_BASE64}" | base64 -d > /config/phpmyadmin/config.inc.php
+fi
+
+if [[ -n "${PMA_USER_CONFIG_BASE64}" ]]; then
+    echo "${PMA_USER_CONFIG_BASE64}" | base64 -d > /config/phpmyadmin/config.user.inc.php
+fi
+
+if [[ ! -f /config/phpmyadmin/config.user.inc.php ]]; then
     touch /config/phpmyadmin/config.user.inc.php
 fi
 
-if [ ! -f /config/phpmyadmin/config.inc.php ]; then
+if [[ ! -f /config/phpmyadmin/config.inc.php ]]; then
     cp /defaults/config.inc.php /config/phpmyadmin/config.inc.php
 fi