Add cloudbuild configuration for fastcgi test image

images/fastcgi-helloserver/rootfs/.gitignore

@@ -1 +0,0 @@
-fastcgi-helloserver

images/fastcgi-helloserver/rootfs/Dockerfile

@@ -12,8 +12,21 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM scratch
+FROM golang:1.14-alpine as builder
 
-COPY . /
+WORKDIR /go/src/k8s.io/ingress-nginx/images/fastcgi
+
+COPY . .
+
+RUN CGO_ENABLED=0 go build -a -installsuffix cgo \
+	-ldflags "-s -w" \
+	-o fastcgi-helloserver main.go
+
+# Use distroless as minimal base image to package the binary
+# Refer to https://github.com/GoogleContainerTools/distroless for more details
+FROM gcr.io/distroless/static:nonroot
+
+COPY --from=builder /go/src/k8s.io/ingress-nginx/images/fastcgi/fastcgi-helloserver /
+USER nonroot:nonroot
 
 CMD ["/fastcgi-helloserver"]

images/fastcgi-helloserver/rootfs/main.go

@@ -0,0 +1,30 @@
+package main
+
+import (
+	"fmt"
+	"net"
+	"net/http"
+	"net/http/fcgi"
+)
+
+func hello(w http.ResponseWriter, r *http.Request) {
+	keys, ok := r.URL.Query()["name"]
+
+	if !ok || len(keys[0]) < 1 {
+		fmt.Fprintf(w, "Hello world!")
+		return
+	}
+
+	key := keys[0]
+	fmt.Fprintf(w, "Hello "+string(key)+"!")
+}
+
+func main() {
+	http.HandleFunc("/hello", hello)
+
+	l, err := net.Listen("tcp", "0.0.0.0:9000")
+	if err != nil {
+		panic(err)
+	}
+	fcgi.Serve(l, nil)
+}