Update golang Docker tag

renovate[bot] · web-flow · commit 6b243b89ae1e · 2024-02-07T01:01:29.000Z
diff --git a/.tool-versions b/.tool-versions
@@ -1 +1 @@
-golang 1.18
+golang 1.22.0
diff --git a/Dockerfile b/Dockerfile
@@ -2,7 +2,7 @@
 ###############################
 # Build the doctree Go binary #
 ###############################
-FROM golang:1.18-alpine as builder
+FROM golang:1.21-alpine@sha256:7d43edac318983a0ec945494efdc11cc824ae995226846f3dc7acfdb2b445b67 as builder
 
 RUN apk add --no-cache git build-base
 COPY . /doctree
