Update dependency golang to v1.19

renovate[bot] · web-flow · commit 0173fa9a56e7 · 2022-08-09T19:17:17.000Z
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@sha256:7ade7287cac49766fcdf39f31871052a0d2462400e2e12cea8069d81ea4ce087 as builder
 
 RUN apk add --no-cache git build-base
 COPY . /doctree
