diff --git a/.gitignore b/.gitignore
index ac00986..df913a8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,3 @@
-server.crt
-server.key
+services/nginx/server.crt
+services/nginx/server.key
 .env
-services/nextcloud/db.env
diff --git a/configure.bash b/configure.bash
index 3dac8b6..4f29028 100755
--- a/configure.bash
+++ b/configure.bash
@@ -4,14 +4,18 @@ set -eu
 usage="Usage: $0 server_name project_root"
 server_name="${1:?$usage}"
 root="${2:?$usage}"
+
+# Configure hostname for Nginx
 sed -Ei "s/(^[[:blank:]]*server_name [^_][^.]*\.)[^;]*/\1${server_name}/" "$root"/services/nginx/default.conf
+
+# Configure hostname for OpenProject
 sed -Ei "s/(^OPENPROJECT_HOST__NAME=[^.]*\.).*/\1${server_name}/" "$root"/.env
 
 # Configure hostname for Gitea
 # Note that this works only if you use a docker volume named `tvcloud_gitea` (this project default).
 gitea_conf_file=/var/lib/docker/volumes/tvcloud_gitea/_data/gitea/conf/app.init
 if [[ ! -e $gitea_conf_file ]]; then
-  mkdir -p $(dirname "$gitea_conf_file")
+  mkdir -p "$(dirname "$gitea_conf_file")"
   touch "$gitea_conf_file"
 fi
 if grep -Eq "\[server\] ROOT_URL = https://gitea\." $gitea_conf_file; then
diff --git a/readme.md b/readme.md
index 22d91ed..4092eb6 100644
--- a/readme.md
+++ b/readme.md
@@ -10,11 +10,18 @@ This project is a personal cloud of services:
 1. Generate a self-signed certificate for the proxy.
 
 ```
-host=tvcloud.fr
-mkcert \
--cert-file services/nginx/server.crt \
--key-file services/nginx/server.key \
-gitea.$host nextcloud.$host openproject.$host $host 127.0.0.1 ::1
+host=yourdomain.com
+mkcert -cert-file services/nginx/server.crt -key-file services/nginx/server.key \
+gitea.$host nextcloud.$host openproject.$host \
+$host 127.0.0.1 ::1
+```
+
+Alternatively you can generate a real CA signed certificate (if your own a domain):
+
+```
+sudo certbot certonly --cert-path services/nginx/server.crt --key-path services/nginx/server.key \
+--manual --preferred-challenges dns --agree-tos --email admin@example.com \
+-d gitea.yourdomain.com -d nextcloud.yourdomain.com -d openproject.yourdomain.com
 ```
 
 2. Make a `.env` file (for `docker compose`).
@@ -24,7 +31,7 @@ See `.example.env`.
 3. Configure the host name.
 
 ```
-host=tvcloud.fr
+host=yourdomain.com
 sudo ./configure.bash $host .
 ```
 
diff --git a/services/nginx/default.conf b/services/nginx/default.conf
index 982d7d3..ee1d80c 100644
--- a/services/nginx/default.conf
+++ b/services/nginx/default.conf
@@ -20,7 +20,7 @@ server {
 
 server {
     listen 443 ssl;
-    server_name openproject.tvcloud.fr;
+    server_name openproject.yourdomain.com;
 
     ssl_certificate     /etc/ssl/crt/server.crt;
     ssl_certificate_key /etc/ssl/crt/server.key;
@@ -40,7 +40,7 @@ server {
 
 server {
     listen 443 ssl;
-    server_name gitea.tvcloud.fr;
+    server_name gitea.yourdomain.com;
 
     ssl_certificate     /etc/ssl/crt/server.crt;
     ssl_certificate_key /etc/ssl/crt/server.key;
@@ -61,7 +61,7 @@ server {
 # https://github.com/nextcloud/docker/blob/master/.examples/docker-compose/with-nginx-proxy/mariadb/fpm/web/nginx.conf
 server {
     listen 443 ssl;
-    server_name nextcloud.localhost;
+    server_name nextcloud.yourdomain.com;
 
     ssl_certificate     /etc/ssl/crt/server.crt;
     ssl_certificate_key /etc/ssl/crt/server.key;