fix dockerfile style

Signed-off-by: Markus Blaschke <[email protected]>

Author: mblaschke

Dockerfile

@@ -1,7 +1,7 @@
 #############################################
 # Build
 #############################################
-FROM --platform=$BUILDPLATFORM golang:1.24-alpine as build
+FROM --platform=$BUILDPLATFORM golang:1.24-alpine AS build
 
 RUN apk upgrade --no-cache --force
 RUN apk add --update build-base make git
@@ -21,7 +21,7 @@ RUN GOOS=${TARGETOS} GOARCH=${TARGETARCH} make build
 #############################################
 # Test
 #############################################
-FROM gcr.io/distroless/static as test
+FROM gcr.io/distroless/static AS test
 USER 0:0
 WORKDIR /app
 COPY --from=build /go/src/github.com/webdevops/kube-bootstrap-token-manager/kube-bootstrap-token-manager .