Update dependency golang to v1.19

renovate[bot] · web-flow · commit ec1f136116ac · 2022-08-09T21:54:37.000Z
diff --git a/Dockerfile b/Dockerfile
@@ -2,7 +2,7 @@
 ###############################
 # Build the doctree Go binary #
 ###############################
-FROM golang:1.18-alpine as builder
+FROM golang:1.19-alpine@sha256:7abc53c7b712049462918f8755d74739bf43bbf446a68789714ec0de2a506f18 as builder
 
 RUN apk add --no-cache git build-base
 COPY . /doctree
