fix: add golang Dockerfile to build goharbor/golang image

Signed-off-by: Shengwen Yu <yshengwen@vmware.com>

make/photon/golang/Dockerfile

@@ -0,0 +1,35 @@
+FROM photon:4.0
+
+ARG GOVERSION
+
+# install cgo-related dependencies && git
+# official golang build from standard Debian, while photon os do not install git as default
+RUN tdnf install build-essential git gpg -y
+
+ENV PATH /usr/local/go/bin:$PATH
+
+ENV GOLANG_VERSION ${GOVERSION}
+
+RUN set eux; \
+    url="https://dl.google.com/go/go${GOLANG_VERSION}.linux-amd64.tar.gz"; \
+    sha256="904b924d435eaea086515bc63235b192ea441bd8c9b198c507e85009e6e4c7f0"; \
+    wget -O go.tgz.asc "$url.asc"; \
+    wget -O go.tgz "$url"; \
+    echo "$sha256 *go.tgz" | sha256sum -c -; \
+    # https://github.com/golang/go/issues/14739#issuecomment-324767697
+	GNUPGHOME="$(mktemp -d)"; export GNUPGHOME; \
+    # https://www.google.com/linuxrepositories/
+	gpg --batch --keyserver keyserver.ubuntu.com --recv-keys 'EB4C 1BFD 4F04 2F6D DDCC  EC91 7721 F63B D38B 4796'; \
+    # let's also fetch the specific subkey of that key explicitly that we expect "go.tgz.asc" to be signed by, just to make sure we definitely have it
+	gpg --batch --keyserver keyserver.ubuntu.com --recv-keys '2F52 8D36 D67B 69ED F998  D857 78BD 6547 3CB3 BD13'; \
+	gpg --batch --verify go.tgz.asc go.tgz; \
+	gpgconf --kill all; \
+	rm -rf "$GNUPGHOME" go.tgz.asc; \
+    tar -C /usr/local -xzf go.tgz; \
+    rm go.tgz; \
+    go version
+
+ENV GOPATH /go
+ENV PATH $GOPATH/bin:$PATH
+RUN mkdir -p "$GOPATH/src" "$GOPATH/bin" && chmod -R 1777 "$GOPATH"
+WORKDIR $GOPATH