From 0c760e976c47b6e3be5d5535c6add2552dd0d5ef Mon Sep 17 00:00:00 2001
From: Christian Stussak <christian.stussak@imaginary.org>
Date: Fri, 24 Jul 2020 13:57:02 +0200
Subject: [PATCH] Update treetagger_builder to ubuntu:20.04

The switch to a newer base image is necessary since Ubuntu 19.04 is end-of-life.
---
 Dockerfile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Dockerfile b/Dockerfile
index 8ac70ba..8ce836f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # temporary image
-FROM ubuntu:19.04 AS treetagger_builder
+FROM ubuntu:20.04 AS treetagger_builder
 
 # TreeTagger version
 ARG VERSION=3.2.2