Add entrypoint

Dockerfile

@@ -8,3 +8,5 @@ RUN mkdir ${WEBROOT} && mkdir /storage
 VOLUME ["/storage"]
 
 COPY share_v2.php ${WEBROOT}
+
+ENTRYPOINT /entrypoint.sh

entrypoint.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+
+sed -i -e "s/^\(\$CONFIG_STORE_DIR = \).*/\1'\/storage'/" /webroot/share_v2.php
+sed -i -e "s/^\(\$CONFIG_SECRET = \).*/\1'${SECRET_KEY}'/" /webroot/share_v2.php
+
+exec "/start.sh"