BUILD/MEDIUM: enable VCS version stamping in compiled binary

Modify the Dockerfile and GitHub Actions workflow to ensure Go embeds accurate version control information into the compiled binary. This allows debug.ReadBuildInfo to read the correct version and commit hash during runtime.

Author: oktalz

.github/workflows/build_on_tag.yaml

@@ -24,6 +24,9 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
+        with:
+          # full history + tags so go build stamps the real version
+          fetch-depth: 0
 
       - name: Build image
         run: docker build . --file Dockerfile --tag $IMAGE_NAME --label "runnumber=${GITHUB_RUN_ID}"

Dockerfile

@@ -1,8 +1,10 @@
 FROM golang:alpine AS builder
+# git is required for VCS version stamping (debug.ReadBuildInfo)
+RUN apk --no-cache add git
 RUN mkdir /build
 ADD . /build/
 WORKDIR /build
-RUN go build -o check
+RUN go build -buildvcs=true -o check
 
 FROM alpine:latest
 RUN apk --no-cache add aspell aspell-en