chore: Upgrade golang docker image to v1.21.1

Neurostep · Neurostep · commit a87a8e128164 · 2023-09-18T17:07:59.000+02:00
diff --git a/Dockerfile b/Dockerfile
@@ -2,7 +2,7 @@
 # build stage
 # =============================================================================
 
-FROM golang:1.20.6-alpine AS builder
+FROM golang:1.21.1-alpine AS builder
 
 WORKDIR /sdk
 
