Now based on Alpine Linux and s6 as supervisor, resulting in a much smaller Docker image. See README.md for details and other additions.

root/etc/services.d/.s6-svscan/finish

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+exit 0

root/etc/services.d/nginx/run

@@ -0,0 +1,2 @@
+#!/bin/sh
+exec nginx

root/etc/services.d/php/run

@@ -0,0 +1,2 @@
+#!/bin/sh
+exec php-fpm

root/etc/services.d/ttrss-daemon/run

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+while true; do
+  cd /var/www/ttrss
+  php -f /var/www/ttrss/update_daemon2.php
+  sleep 5m
+done

root/etc/services.d/ttrss-updater/run

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+while true; do
+  /srv/update-ttrss.sh
+  sleep 24h
+done