README.md

 To create the binaries for a new version of either Alpine or wkhtmltopdf, use this `Dockerfile` and adjust the version tags:
 
 ```
-FROM surnet/alpine-wkhtmltopdf:3.19.0-0.12.6-full as wkhtmltopdf
-FROM php:8.2-fpm-alpine3.19 AS app
+FROM surnet/alpine-wkhtmltopdf:3.20.0-0.12.6-full as wkhtmltopdf
+FROM php:8.2-fpm-alpine3.20 AS app
 
 # wkhtmltopdf install dependencies
 RUN apk add --no-cache \