feat: Add basic setup for Payload CMS

ansible/roles/payload/templates/bin/updatePayload.sh.j2

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+if [ ! -e ~/payload-new ]; then
+    echo "No-op: source does not exist."
+    exit 0
+fi
+
+DATE=$(date +"%Y-%m-%dT%H:%M:%S")
+supervisorctl stop payload
+[ -e ~/payload ] && mv ~/payload ~/payload-old-$DATE
+mv ~/payload-new ~/payload
+cd ~/payload
+npm install
+supervisorctl start payload

ansible/roles/payload/templates/etc/services.d/payload.ini.j2

@@ -0,0 +1,8 @@
+[program:payload]
+directory=%(ENV_HOME)s/payload
+command=npm run start
+autostart=true
+autorestart=true
+environment=NODE_ENV=production
+# `startsecs` is set by Uberspace monitoring team, to prevent a broken service from looping
+startsecs=30