chore: #72 Update go in DOckerfile to 1.21.3

Signed-off-by: Laurent Broudoux <laurent.broudoux@gmail.com>

Author: lbroudoux

build/Dockerfile

@@ -1,5 +1,5 @@
 # Build binary
-FROM --platform=$BUILDPLATFORM golang:1.17.1-alpine AS build-env
+FROM --platform=$BUILDPLATFORM golang:1.21.3-alpine AS build-env
 ADD . /app
 WORKDIR /app
 ARG TARGETOS