Allow listening on a specific address

The address is read from the ADDR environment variable. Defaults to
every address.

1 files changed, 1 insertions, 1 deletions

diff --git a/gcp/main.go b/gcp/main.go
index c5c8466..bb792cc 100644
--- a/gcp/main.go
+++ b/gcp/main.go
@@ -31,5 +31,5 @@ func main() {
 		port = "8080"
 	}
 	http.HandleFunc("/", redirect)
-	log.Fatal(http.ListenAndServe(":"+port, nil))
+	log.Fatal(http.ListenAndServe(os.Getenv("ADDR")+":"+port, nil))
 }