Add the fonts that the guide talks about - the license allows for it.

Author: Ackis

Pi_Hole_Ad_Blocker/fonts/readme.txt

@@ -0,0 +1,6 @@
+Silkscreen was created by Jason Kottke and is distributed under the Open Font License, which means that you can use, distribute, or modify it however you wish. More information about the license and Silkscreen is available on the web:
+
+http://scripts.sil.org/OFL
+http://www.kottke.org/plus/type/silkscreen/
+
+To install Silkscreen, simply copy the two .ttf files to your fonts directory.

Pi_Hole_Ad_Blocker/fonts/slkscr.ttf

@@ -47,7 +47,7 @@
 api_url = 'http://localhost/admin/api.php'
 
 # Load nice silkscreen font
-font = ImageFont.truetype('/home/pi/slkscr.ttf', 8)
+font = ImageFont.truetype('fonts/slkscr.ttf', 8)
 
 # Create the I2C interface.
 i2c = busio.I2C(SCL, SDA)