use new s6-rc layout [skip ci]

Dockerfile

@@ -22,8 +22,8 @@ RUN echo "$COMPOSER_SHA256_SUM  composer.phar" | sha256sum -c - || exit 1
 RUN mv composer.phar /usr/bin/composer
 RUN chmod +x /usr/bin/composer
 
-ENV VERSION=1.5.1
-ENV SHA256_SUM=611b0d80227d0b70289c715787b2d85fd15ed915eb56d585c104c24376036e83
+ENV VERSION=1.5.2
+ENV SHA256_SUM=f03968381156fe790d858af7e069c5550a8577fb964f96624434895272053838
 RUN wget https://github.com/roundcube/roundcubemail/releases/download/$VERSION/roundcubemail-$VERSION-complete.tar.gz
 RUN echo "$SHA256_SUM  roundcubemail-$VERSION-complete.tar.gz" | sha256sum -c - || exit 1
 RUN mkdir -p /var/lib/roundcube

rootfs/bin/dbinit

@@ -1,4 +1,4 @@
-#!/usr/bin/with-contenv sh
+#!/bin/sh
 
 PGPASSWORD=$DB_PASSWORD psql -h $DB_HOST -U $DB_USER -d $DB_NAME -c "SELECT EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'session')" | grep f
 

rootfs/etc/s6-overlay/s6-rc.d/nginx/run

@@ -1,3 +1,3 @@
-#!/usr/bin/with-contenv sh
+#!/bin/sh
 
 exec nginx -g "daemon off;"

rootfs/etc/services.d/nginx/run

@@ -1,3 +0,0 @@
-#!/usr/bin/with-contenv sh
-
-exec nginx -g "daemon off;"