Add systemd deployment example

Signed-off-by: Jacob Kiers <jacob@jacobkiers.net>

systemd/build-feed.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+set -euo pipefail
+
+N2W='/path/to/newsletter-to-web'
+
+# I used dav2fs to mount a DAV filesystem, so that the feed is
+# automatically published.
+#
+# This symlinked the output/ folder to dav/
+#mount $(pwd)/dav || true
+
+
+# Change the credentials
+${N2W} fetch-from-imap -s mail.example.org --username newsletters@example.org --password 'SuperSecret'
+
+# -i: Include the full text
+# newsletters.example.org: hostname where the feed is hosted
+${N2W} build-feed -i newsletters.example.org

systemd/newsletter2web.service

@@ -0,0 +1,7 @@
+[Unit]
+Description=Create newsletter feed
+
+[Service]
+Type=oneshot
+WorkingDirectory=/home/n2w
+ExecStart=/home/n2w/build-feed.sh

systemd/newsletter2web.timer

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+[Unit]
+Description=Publish newsletters
+
+[Timer]
+# Run two times a day, starting at 01:38
+OnCalendar=*-*-* 09/12:38:00
+Persistent=true
+
+[Install]
+WantedBy=default.target