more otel

Dockerfile

@@ -1,8 +1,14 @@
+ARG APP_RELEASE=dev
+ARG PUBLIC_SOURCEMAPS=false
+
 # UI build stage
 ARG TARGETOS
 ARG TARGETARCH
 FROM node:alpine AS ui-builder
 
+ARG APP_RELEASE
+ENV VITE_APP_RELEASE=${APP_RELEASE}
+
 WORKDIR /app
 
 COPY otel-ui/ .
@@ -28,6 +34,8 @@ RUN CGO_ENABLED=0 GOOS=${TARGETOS} GOARCH=${TARGETARCH} go build -a -installsuff
 # Final stage
 FROM alpine:latest
 
+ARG PUBLIC_SOURCEMAPS
+
 RUN apk --no-cache add ca-certificates
 
 # Create non-root user
@@ -39,6 +47,11 @@ COPY --from=go-builder /go-otel .
 COPY --from=go-builder /app/otel-ui/dist ./dist
 COPY static/ ./static
 COPY agents_example.md .
+COPY instrumentation.md .
+
+# Private server-side maps are the default. Staging/dev can opt into public
+# maps for Chrome DevTools with --build-arg PUBLIC_SOURCEMAPS=true.
+RUN if [ "${PUBLIC_SOURCEMAPS}" != "true" ]; then find ./dist -type f -name '*.map' -delete; fi
 
 # Ensure the appuser owns the files
 RUN chown -R appuser:appgroup /home/appuser/