fix(makefile): fix go-gpt2 folder and add verification before git clone (#51)

Co-authored-by: Ettore Di Giacinto <mudler@users.noreply.github.com>

Dockerfile

@@ -1,11 +1,12 @@
 ARG GO_VERSION=1.20
 ARG DEBIAN_VERSION=11
+ARG BUILD_TYPE=
+
 FROM golang:$GO_VERSION as builder
 WORKDIR /build
 RUN apt-get update && apt-get install -y cmake
 COPY . .
-ARG BUILD_TYPE=
-RUN make build${BUILD_TYPE}
+RUN make build
 
 FROM debian:$DEBIAN_VERSION
 COPY --from=builder /build/local-ai /usr/bin/local-ai