added .well-known path to Caddy2 example, closes #1442

examples/caddy2/Caddyfile

@@ -27,6 +27,10 @@ matrix.DOMAIN.tld {
         not path /matrix/static-files/*
   }
 
+  @wellknown {
+        path /.well-known/matrix/*
+  }
+
   header {
         # Enable HTTP Strict Transport Security (HSTS) to force clients to always connect via HTTPS
         Strict-Transport-Security "max-age=31536000; includeSubDomains; preload"
@@ -69,6 +73,15 @@ matrix.DOMAIN.tld {
         }
   }
 
+  handle @wellknown {
+        encode zstd gzip
+        root * /matrix/static-files
+	header Cache-Control max-age=14400
+        header Content-Type application/json
+        header Access-Control-Allow-Origin *
+        file_server
+  }
+
   handle {
         encode zstd gzip