diff --git a/README.md b/README.md
index 8e2119f7b..8de9dbfcf 100644
--- a/README.md
+++ b/README.md
@@ -3,8 +3,16 @@
 mailcow dockerized comes with 11 containers linked in a mailcow network:
 Dovecot, Memcached, Redis, MariaDB, PowerDNS Recursor, PHP-FPM, Postfix, Nginx, Rmilter, Rspamd and SOGo.
 
+The DNS resolver is DNSSEC enabled and forwards local hostnames to Docker.
+
 ## Installation
 
+You need Docker. Most systems can install Docker by running the following command:
+
+```
+wget -qO- https://get.docker.com/ | sh
+```
+
 1. Open mailcow.conf and change stuff, do not use special chars in passwords. This will be fixed soon.
 
 2. Run ./build-all.sh
diff --git a/build-nginx.sh b/build-nginx.sh
index dfb82bb50..3772f2aa0 100755
--- a/build-nginx.sh
+++ b/build-nginx.sh
@@ -24,6 +24,7 @@ sed -i "s#database_pass.*#database_pass = \"${DBPASS}\";#" data/web/inc/vars.inc
 
 docker run \
 	-p 443:443 \
+    --expose 8081 \
 	--name ${NAME} \
 	-v ${PWD}/data/web:/web:ro \
 	-v ${PWD}/data/conf/rspamd/dynmaps:/dynmaps:ro \