Fix error with conversion rate

Ensure that question marks are encoded properly for the database

Adds test

Revert "Get fresh search console data"

This reverts commit 3ab19af.

Remove beta notice from the API keys section

Upgrade mailer dependency (plausible#899)

* Upgrade mailer dependency

* Changelog

Merge pull request plausible#655 from jonnitto/patch-1

Fix: Re-add hash and outbound-links only options

Do not allow duplicate spike notification to be created

Self hosted improvements (plausible#603)

* Introduce SELFHOST config. Enable cron by default for self hosters

* Fix cron, disable custom domain for selfhost

* Add github links

* Add notice about google search console on self hosted

* Enfore BASE_URL

* Set all selfhost users' trial expiry to 100 years from now

* Fix admin user creation

Revert change to Dockerfile