Bump golang from 1.18.5-alpine to 1.19.0-alpine in /docker/prod (#24)

Bumps golang from 1.18.5-alpine to 1.19.0-alpine.

---
updated-dependencies:
- dependency-name: golang
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

docker/prod/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.18.5-alpine as build-stage
+FROM golang:1.19.0-alpine as build-stage
 
 RUN apk --no-cache add \
     g++ \