Use go 1.20

.jenkins/Jenkinsfile

@@ -36,7 +36,6 @@ pipeline {
 							env.BUILDX_PUSH_TAGS_ACMESH_GOLANG = "-t docker.io/jc21/${IMAGE}:acmesh-golang"
 							env.BUILDX_PUSH_TAGS_CERTBOT_NODE  = "-t docker.io/jc21/${IMAGE}:certbot-node"
 						}
-						sh 'env'
 					}
 				}
 				stage('Other') {

docker/Dockerfile.acmesh-golang

@@ -1,4 +1,4 @@
-FROM golang:1.19.6 as go
+FROM golang:1.20 as go
 FROM jc21/nginx-full:${ACMESH_BASE_TAG:-acmesh}
 LABEL maintainer="Jamie Curnow <jc@jc21.com>"