add go example

examples/go_http_hello/Dockerfile

@@ -0,0 +1,9 @@
+ARG GO_IMAGE=ocirep:go
+FROM ${GO_IMAGE} as build
+COPY . .
+RUN cargo build main.go
+
+ARG CA_IMAGE=ocirep:ca-certificates
+FROM scratch
+COPY --from=${CA_IMAGE} /
+COPY --from=build main .

examples/go_http_hello/main.go

@@ -0,0 +1,15 @@
+package main
+
+import (
+    "fmt"
+    "net/http"
+)
+
+func main() {
+    http.HandleFunc("/", HelloServer)
+    http.ListenAndServe(":8080", nil)
+}
+
+func HelloServer(w http.ResponseWriter, r *http.Request) {
+    fmt.Fprintf(w, "Hello, %s!", r.URL.Path[1:])
+}