v1.13.0-ls49

LinuxServer Changes:

Add postgres client and fix config for CSRF.
healthchecks Changes:

Improvements

• Show a red "!" in project's top navigation if any integration is not working
• createsuperuser management command requires an unique email address (#318)
• For superusers, show "Site Administration" in top navigation, note in README (#317)
• Make Ping.body size limit configurable (#301)
• Show sub-second durations with higher precision, 2 digits after decimal point (#321)
• Replace the gear icon with three horizontal dots icon (#322)
• Add a Pause button in the checks list (#312)
• Documentation in Markdown
• Added an example of capturing and submitting log output (#315)
• The sendalerts commands measures dwell time and reports it over statsd protocol
• Django 3.0.3
• Show a warning in top navigation if the project has no integrations (#327)

Bug Fixes

• Increase the allowable length of Matrix room alias to 100 (#320)
• Make sure Check.last_ping and Ping.created timestamps match exactly
• Don't trigger "down" notifications when changing schedule interactively in web UI
• Fix sendalerts crash loop when encountering a bad cron schedule
• Stricter cron validation, reject schedules like "At midnight of February 31"
• In hc.front.views.ping_details, if a ping does not exist, return a friendly message