fix(build): sync go versions between promu crossbuild and docker imag…

…es (#494)

fix(build): sync go versions for binaries and images

.github/workflows/release.yml

@@ -55,6 +55,10 @@ jobs:
       - name: Check out the repo
         uses: actions/checkout@v4
 
+      - name: Get Go version from the '.promu.yml' config
+        id: promu-go-version
+        run: printf "version=%s" "$(yq '.go.version' .promu.yml)" >> $GITHUB_OUTPUT
+
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3
 
@@ -86,3 +90,5 @@ jobs:
           labels: ${{ steps.meta.outputs.labels }}
           platforms: linux/amd64,linux/arm64
           provenance: false
+          build-args: |
+            GOVERSION={{ steps.promu-go-version.outputs.version }}

Dockerfile.multi-arch

@@ -1,4 +1,6 @@
-FROM --platform=$BUILDPLATFORM quay.io/prometheus/golang-builder AS builder
+ARG GOVERSION=latest
+
+FROM --platform=$BUILDPLATFORM quay.io/prometheus/golang-builder:${GOVERSION}-main AS builder
 
 # Get sql_exporter
 ADD .   /go/src/github.com/burningalchemist/sql_exporter