Initial add of cups add-on

cups/rootfs/etc/cont-init.d/dbus-setup

@@ -0,0 +1,2 @@
+#!/bin/sh
+mkdir -p /var/run/dbus

cups/rootfs/etc/nginx/nginx.conf

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+events {
+}
+
+http {
+
+    server {
+        listen 8099;
+
+        location / {
+            proxy_pass https://localhost:631;
+            proxy_hide_header X-Frame-Options;
+            proxy_hide_header Content-Security-Policy;
+            add_header Content-Security-Policy "sandbox allow-forms allow-modals allow-popups allow-popups-to-escape-sandbox allow-scripts";
+            sub_filter '"/' '"$http_x_ingress_path/';
+            sub_filter "'/" "'$http_x_ingress_path/";
+            sub_filter_once off;
+        }
+    }
+}

cups/rootfs/etc/services.d/avahi/run

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+#!/bin/sh
+
+# Wait until D-Bus is up and the init script has mapped in the external hostname
+until [ -e /var/run/dbus/system_bus_socket ] && [ -e /var/run/avahi_configured ]; do
+  sleep 1s
+done
+
+exec avahi-daemon

cups/rootfs/etc/services.d/dbus/run

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+#!/bin/sh
+exec dbus-daemon --system --nofork

cups/rootfs/etc/services.d/nginx/run

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+#!/bin/sh
+exec nginx -g "daemon off;"