diff --git a/.woodpecker.yml b/.woodpecker.yml
index 4d8908b..9b6d7ed 100644
--- a/.woodpecker.yml
+++ b/.woodpecker.yml
@@ -1,34 +1,32 @@
 pipeline:
   publish:
     image: plugins/docker
-    registry: registry.nulo.in
-    repo: registry.nulo.in/sutty/rails
-    tags:
-    - ${ALPINE_VERSION}-${RUBY_VERSION}.${RUBY_PATCH}
-    - latest
-    build_args:
-    - RUBY_VERSION=${RUBY_VERSION}
-    - RUBY_PATCH=${RUBY_PATCH}
-    - ALPINE_VERSION=${ALPINE_VERSION}
-    - BASE_IMAGE=registry.nulo.in/sutty/ruby
-    username: sutty
+    settings:
+      registry: registry.nulo.in
+      username: sutty
+      repo: registry.nulo.in/sutty/rails
+      tags:
+      - ${ALPINE_VERSION}-${RUBY_VERSION}.${RUBY_PATCH}
+      - latest
+      build_args:
+      - RUBY_VERSION=${RUBY_VERSION}
+      - RUBY_PATCH=${RUBY_PATCH}
+      - ALPINE_VERSION=${ALPINE_VERSION}
+      - BASE_IMAGE=registry.nulo.in/sutty/ruby
+      purge: false
     secrets:
     - docker_password
-    cache_from: registry.nulo.in/sutty/rails:${ALPINE_VERSION}-${RUBY_VERSION}.${RUBY_PATCH}
     when:
       branch: antifascista
       event: push
 matrix:
   include:
-  - ALPINE_VERSION: 3.13.6
+  - ALPINE_VERSION: 3.13.9
     RUBY_VERSION: 2.7
     RUBY_PATCH: 5
-  - ALPINE_VERSION: 3.13.7
+  - ALPINE_VERSION: 3.14.5
     RUBY_VERSION: 2.7
     RUBY_PATCH: 5
-  - ALPINE_VERSION: 3.14.3
-    RUBY_VERSION: 2.7
-    RUBY_PATCH: 5
-  - ALPINE_VERSION: 3.15.0
+  - ALPINE_VERSION: 3.15.3
     RUBY_VERSION: 3.0
     RUBY_PATCH: 3
diff --git a/monitrc b/monitrc
index 80a42f4..40585f6 100644
--- a/monitrc
+++ b/monitrc
@@ -5,17 +5,16 @@ set pidfile /run/monit.pid
 set idfile /var/lib/monit/id
 set statefile /var/lib/monit/state
 set eventqueue basedir /var/lib/monit/events slots 100
-set mailserver postfix
 set limits { programoutput: 1 MB }
-set alert @@EMAIL@@
-
-set httpd port 2812
-  allow localhost
-  allow 172.0.0.0/8
 
 check program nsupdate
   with path "/usr/local/bin/nsupdate"
   every 1 cycle
   if status = 0 then unmonitor
 
+check program zeroconf
+  with path "/usr/local/bin/zeroconf"
+  every 1 cycle
+  if status = 0 then unmonitor
+
 include /etc/monit.d/*.conf
diff --git a/nsupdate.sh b/nsupdate.sh
deleted file mode 100755
index 5fe991f..0000000
--- a/nsupdate.sh
+++ /dev/null
@@ -1,26 +0,0 @@
-#!/bin/sh
-
-# Registers the local IPv6 address to the DNS
-
-IP6="`whatsmyip6`"
-KNOT="${KNOT:-${IP6}}"
-
-test -z "${IP6}" && exit 1
-test -z "${KNOT}" && exit 1
-test -z "${DOMAIN}" && exit 1
-
-# Add a dot if the hostname contains the domain
-echo "${HOSTNAME}" | grep -q "\.${DOMAIN}$" && DOT="."
-
-knsupdate <<DNS
-server ${KNOT}
-zone ${DOMAIN}.
-origin ${DOMAIN}.
-ttl 60
-del ${HOSTNAME}${DOT} AAAA
-add ${HOSTNAME}${DOT} AAAA ${IP6}
-send
-quit
-DNS
-
-exit $?
diff --git a/whatsmyip6.sh b/whatsmyip6.sh
deleted file mode 100755
index 641fb7d..0000000
--- a/whatsmyip6.sh
+++ /dev/null
@@ -1,3 +0,0 @@
-#!/bin/sh
-
-ip address show ${1:-eth0} | grep inet6 | grep global | tr -s " "  | cut -d " " -f 3 | cut -d / -f 1
diff --git a/zeroconf.conf b/zeroconf.conf
new file mode 100644
index 0000000..6ecefda
--- /dev/null
+++ b/zeroconf.conf
@@ -0,0 +1,16 @@
+set mmonit http://@@MMONIT@@/collector
+set mailserver postfix port 25 using hostname @@HOSTNAME@@
+
+set alert @@EMAIL@@
+
+set mail-format {
+  from: Monit <@@EMAIL_FROM@@>
+  subject: $HOST
+  message: $ACTION $SERVICE -- $DATE: $DESCRIPTION.
+}
+
+set httpd port 2812
+  allow localhost
+  allow 172.0.0.0/8
+  allow "fd00:acab::/32"
+  allow @@CREDENTIALS@@
diff --git a/zeroconf.sh b/zeroconf.sh
new file mode 100755
index 0000000..79b64f3
--- /dev/null
+++ b/zeroconf.sh
@@ -0,0 +1,19 @@
+#!/bin/sh
+set -e
+
+test ! -f /etc/monit.d/zeroconf.conf || exit 0
+
+test -n "${EMAIL}"
+test -n "${EMAIL_FROM}"
+test -n "${MMONIT}"
+test -n "${CREDENTIALS}"
+
+sed -re "s/@@EMAIL@@/${EMAIL}/" \
+     -e "s/@@EMAIL_FROM@@/${EMAIL_FROM}/" \
+     -e "s/@@HOSTNAME@@/${EMAIL_FROM#*@}/" \
+     -e "s/@@MMONIT@@/${MMONIT}/" \
+     -e "s/@@CREDENTIALS@@/${CREDENTIALS}/" \
+     /etc/zeroconf.conf > /etc/monit.d/zeroconf.conf
+
+monit -t
+monit reload