feat: add build version injection via CI_COMMIT argument

Inject the build version into the binary using the CI_COMMIT 
argument for better traceability of deployments. Update the 
Dockerfile to pass the commit hash to the build process, 
ensuring that each build contains version information tied 
to the specific commit.

Dockerfile

@@ -4,6 +4,7 @@ ADD go.* /build
 RUN go mod download
 
 FROM modules as build
+ARG CI_COMMIT
 WORKDIR /build
 ENV CGO_ENABLED=0
 ADD . /build
@@ -17,7 +18,7 @@ RUN GOOS=linux GOARCH=amd64 go build \
         -a -installsuffix cgo \
         -mod=readonly \
         -o /release/service \
-         -ldflags '-w -s' \
+        -ldflags "-w -s -X main.buildVersion=${CI_COMMIT}" \
          ./cmd/service/service.go
 
 FROM scratch as export