[SEBA-497] Release tag an alpine-based image

Change-Id: I669f0a25429b15957b335b6448283e105a2ce09c
diff --git a/VERSION b/VERSION
index c10edc3..7ec1d6d 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.1.0-dev
+2.1.0