initial commit

deploy/caddy/mailadmin-snippet.caddy

@@ -0,0 +1,7 @@
+# Add this block in the per-domain loop of caddy/update-caddy-certs.sh.
+# It assumes the mailadmin container is on the same external Docker network.
+
+mailadmin.{$DOMAIN_NAME} {
+    encode gzip
+    reverse_proxy mailadmin:3000
+}