clean config, support read-only non-root docker

Signed-off-by: ngn <ngn@ngn.tf>

docker/init.sh

@@ -1,11 +1,17 @@
-#!/bin/sh
-set -e
+#!/bin/sh -e
 
-if [ ! -f '/var/www/html/4get/data/config.php' ] && [ -f './gen_config.php' ]
-then
-  php ./gen_config.php
-  rm -f ./gen_config.php
+config='/srv/4get/data/config.php'
+defconfig='/srv/4get/data/config.def.php'
+
+# check for the configuration file
+if [ ! -f "${config}" ]; then
+  echo "configuration file not specified"
+  echo "here's the default configuration, modify and mount this to ${config}"
+  echo
+  cat "${defconfig}"
+  exit 1
 fi
 
-echo "Starting up apache2"
-exec httpd -DFOREGROUND
+# execute apache
+echo "starting apache web server"
+exec httpd -D FOREGROUND