build: configure posthog managed proxy

Author: TimeToBuildBob

_config.yml

@@ -82,7 +82,11 @@ plugins:
 # Analytics (PostHog)
 # Set posthog_api_key to enable PostHog analytics
 posthog_api_key: phc_vpAJqdjdjgSsZis2hg6LwRh6u37BDgKsPw6tZT8ZjWpi
-posthog_api_host: https://eu.i.posthog.com
+# Default: https://eu.i.posthog.com
+# Set posthog_api_host to your PostHog instance URL if using managed reverse proxy or using a different region
+posthog_api_host: https://t.timetobuildbob.com
+# necessary because you're using a proxy, this way links will point back to PostHog properly
+ui_host: https://eu.posthog.com
 
 # Legacy: Plausible Analytics (will be removed after PostHog migration)
 # plausible_domain: timetobuildbob.github.io