Update golang Docker tag to v1.19

renovate[bot] · web-flow · commit a3a70b2b81a6 · 2022-09-25T13:10:17.000Z
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:d475cef843a02575ebdcb1416d98cd76bab90a5ae8bc2cd15f357fc08b6a329f as builder
 
 RUN apk add --no-cache git build-base
 COPY . /doctree
