Configurable wifi interface

src/freedombone-app-dokuwiki

         echo '' >> /home/$MY_USERNAME/README
         echo '' >> /home/$MY_USERNAME/README
         echo $'Dokuwiki' >> /home/$MY_USERNAME/README
-        echo '====' >> /home/$MY_USERNAME/README
+        echo  '========' >> /home/$MY_USERNAME/README
         echo $"Dokuwiki onion domain: ${DOKUWIKI_ONION_HOSTNAME}" >> /home/$MY_USERNAME/README
         echo $"Dokuwiki username: $MY_USERNAME" >> /home/$MY_USERNAME/README
         echo $"Dokuwiki password: $DOKUWIKI_ADMIN_PASSWORD" >> /home/$MY_USERNAME/README

src/freedombone-wifi

     fi
 
     systemctl restart network-manager
-    ifdown wlan0
+    ifdown $WIFI_INTERFACE
 }
 
 function hotspot_on {
     echo "    bridge_ports $WIFI_INTERFACE eth0" >> /etc/network/interfaces
 
     systemctl restart network-manager
-    ifup wlan0
+    ifup $WIFI_INTERFACE
     systemctl restart hostapd
 }
 
     echo 'allow-hotplug eth0' >> /etc/network/interfaces
     echo 'iface eth0 inet dhcp' >> /etc/network/interfaces
     echo '' >> /etc/network/interfaces
-    echo 'allow-hotplug wlan0' >> /etc/network/interfaces
-    echo 'iface wlan0 inet manual' >> /etc/network/interfaces
+    echo "allow-hotplug ${WIFI_INTERFACE}" >> /etc/network/interfaces
+    echo "iface ${WIFI_INTERFACE} inet manual" >> /etc/network/interfaces
     echo "  wpa-roam $WIFI_CONFIG" >> /etc/network/interfaces
     echo '' >> /etc/network/interfaces
     echo 'iface default inet dhcp' >> /etc/network/interfaces
     wpa_passphrase "$ssid" "$passphrase" > $WIFI_CONFIG
 
     systemctl restart network-manager
-    ifup wlan0
+    ifup ${WIFI_INTERFACE}
 }
 
 function wifi_none {
     echo 'allow-hotplug eth0' >> /etc/network/interfaces
     echo 'iface eth0 inet dhcp' >> /etc/network/interfaces
     echo '' >> /etc/network/interfaces
-    echo 'allow-hotplug wlan0' >> /etc/network/interfaces
-    echo 'iface wlan0 inet manual' >> /etc/network/interfaces
+    echo "allow-hotplug ${WIFI_INTERFACE}" >> /etc/network/interfaces
+    echo "iface ${WIFI_INTERFACE} inet manual" >> /etc/network/interfaces
     echo "  wpa-roam $WIFI_CONFIG" >> /etc/network/interfaces
     echo '' >> /etc/network/interfaces
     echo 'iface default inet dhcp' >> /etc/network/interfaces
     echo '}' >> $WIFI_CONFIG
 
     systemctl restart network-manager
-    ifup wlan0
+    ifup ${WIFI_INTERFACE}
 }
 
 function networks_from_file {
     echo 'allow-hotplug eth0' >> /etc/network/interfaces
     echo 'iface eth0 inet dhcp' >> /etc/network/interfaces
     echo '' >> /etc/network/interfaces
-    echo 'allow-hotplug wlan0' >> /etc/network/interfaces
-    echo 'iface wlan0 inet manual' >> /etc/network/interfaces
+    echo "allow-hotplug ${WIFI_INTERFACE}" >> /etc/network/interfaces
+    echo "iface ${WIFI_INTERFACE} inet manual" >> /etc/network/interfaces
     echo "  wpa-roam $WIFI_CONFIG" >> /etc/network/interfaces
     echo '' >> /etc/network/interfaces
     echo 'iface default inet dhcp' >> /etc/network/interfaces
     done < $WIFI_NETWORKS_FILE
 
     systemctl restart network-manager
-    ifup wlan0
+    ifup ${WIFI_INTERFACE}
 }
 
 function create_networks_interactive {
         echo '# Include files from /etc/network/interfaces.d:' >> /etc/network/interfaces
         echo 'source-directory /etc/network/interfaces.d' >> /etc/network/interfaces
         systemctl restart network-manager
-        ifdown wlan0
+        ifdown ${WIFI_INTERFACE}
     else
         networks_from_file
     fi