Merge pull request #2 from blackskad/version-env-var

Add a build-time app version variable

Dockerfile

@@ -2,6 +2,10 @@
 # try to keep the debian version in sync with the distroless version
 FROM golang:1.23-bookworm as base
 
+ARG VERSION=development
+
+WORKDIR /work
+
 COPY go.mod ./
 COPY go.sum ./
 RUN go mod download
@@ -18,12 +22,12 @@ RUN go test -v
 # Stage to build the binary
 FROM base as build
 
-RUN CGO_ENABLED=0 go build -o /go/bin/app .
+RUN CGO_ENABLED=0 go build -ldflags="-X 'github.com/blackskad/go-web-scaffold/environment.Version=${VERSION}'" -o app .
 
 # Stage with the production binary
 FROM gcr.io/distroless/static-debian12 as production
 
-COPY --from=build /go/bin/app /
+COPY --from=build /work/app /
 
 # port for pprof
 EXPOSE 6060

docker-compose.yaml

@@ -1,5 +1,5 @@
 services:
-  quasar:
+  go-web-scaffold:
     build:
       dockerfile: Dockerfile
       target: production

pkg/environment/environment.go

@@ -1,3 +1,4 @@
 package environment
 
-const Name = "quasar"
+const Name = "go-web-scaffold"
+const Version = "development"

pkg/o11y/otel.go

@@ -31,6 +31,7 @@ func initTracer(ctx context.Context) (*sdktrace.TracerProvider, error) {
 			resource.NewWithAttributes(
 				semconv.SchemaURL,
 				semconv.ServiceName(environment.Name),
+				semconv.ServiceVersion(environment.Version),
 			),
 		),
 	}