Update Dockerfile

Signed-off-by: Alex Ellis <alexellis2@gmail.com>

Author: alexellis

Dockerfile

@@ -1,4 +1,4 @@
-FROM --platform=${BUILDPLATFORM:-linux/amd64} golang:1.18-alpine as builder
+FROM --platform=${BUILDPLATFORM:-linux/amd64} golang:1.19-alpine as builder
 
 ARG TARGETPLATFORM
 ARG BUILDPLATFORM
@@ -18,10 +18,8 @@ COPY go.mod             .
 
 RUN CGO_ENABLED=0 GOOS=${TARGETOS} GOARCH=${TARGETARCH} go test -mod=vendor $(go list ./... | grep -v /vendor/) -cover
 
-# add user in this stage because it cannot be done in next stage which is built from scratch
-# in next stage we'll copy user and group information from this stage
-RUN GOOS=${TARGETOS} GOARCH=${TARGETARCH} CGO_ENABLED=0 go build -mod=vendor -ldflags "-s -w -X main.GitCommit=${GitCommit} -X main.Version=${Version}" -a -installsuffix cgo -o /usr/bin/license-check \
-    && addgroup -S app \
+RUN GOOS=${TARGETOS} GOARCH=${TARGETARCH} CGO_ENABLED=0 go build -mod=vendor -ldflags "-s -w -X main.GitCommit=${GitCommit} -X main.Version=${Version}" -o /usr/bin/license-check
+RUN addgroup -S app \
     && adduser -S -g app app
 
 FROM scratch