Add captive portal and permissions steps

docs/index.md

@@ -531,6 +531,28 @@ $ mkdir /opt/calibre-database
 $ /usr/bin/calibredb restore_database --really-do-it /opt/calibre-database
 ```
 
+## Configure the Captive Portal
+
+When we connect to the Bibliotecha wireless access point, we will be directed
+to a splash page where we are introduced to the library. We need to set that up:
+
+```bash
+$ mkdir /var/www/bibliotecha
+```
+
+And then we download the default page into location:
+
+```bash
+$ apt install -y wget
+$ wget https://git.vvvvvvaria.org/varia/bibliotecha-captive-portal/raw/branch/master/index.html -O /var/www/bibliotecha/index.html
+```
+
+We should also ensure that the correct ownership permissions are configured:
+
+```bash
+$ chown -R www-data: /var/www/bibliotecha
+```
+
 ### Install and Configure Calibre-web
 
 We now setup the Calibre-web installation. We first get a copy of the source with:
@@ -569,6 +591,12 @@ And we also enable this to run on reboot:
 $ systemctl enable cps.service
 ```
 
+We should also ensure that the correct ownership permissions are configured:
+
+```bash
+$ chown -R www-data: /var/www/calibre-web
+```
+
 ### Setup a new MOTD
 
 When you SSH into the Raspberry Pi, you can enable a nice welcome message.