Implement concurrent data retrieval (#128)

Co-authored-by: Oliver Geiselhardt-Herms <[email protected]>

Author: takt

Makefile

@@ -35,7 +35,7 @@ clean:
 
 .PHONY: build-octorpki
 build-octorpki: prepare
-	go build -ldflags $(LDFLAGS) -o $(OUTPUT_OCTORPKI) cmd/octorpki/octorpki.go 
+	go build -ldflags $(LDFLAGS) -o $(OUTPUT_OCTORPKI) cmd/octorpki/*.go
 
 .PHONY: docker-octorpki
 docker-octorpki: