Caddy: Move to more templated approach

no ref

- The goal here is to be able to provide more functionality to self-hosters through snippets and other segmented config
- Some customers run Admin <-> content domains on separate ones which our current config doesn't support
- Our current config also hardcodes a www redirect which complicates setups when you don't have that domain setup or don't even want it
- Moving to a default template customers will have to copy which includes snippets allows us to update these later on without breaking peoples setups

.env.example

@@ -23,9 +23,13 @@ DATABASE_PASSWORD=ghostpassword
 ENABLE_DEVELOPER_EXPERIMENTS=false
 
 # Developer Experiments must be enabled above
-ENABLE_ACTIVITYPUB=false
 ENABLE_TRAFFIC_ANALYTICS=false
 
+# ActivityPub
+ENABLE_ACTIVITYPUB=false
+# If you'd prefer to self-host ActivityPub yourself uncomment the below line
+# ACTIVITYPUB_TARGET=activitypub:8080
+
 # Tinybird configuration
 TINYBIRD_API_URL=https://api.tinybird.co
 TINYBIRD_TRACKER_TOKEN=p.eyJxxxxx