Update golang-http to ship static assets

Tested with following in a new function:

```
file, err := ioutil.ReadFile("./users.txt")
```

Signed-off-by: Alex Ellis <[email protected]>

Author: alexellis

template/golang-http-armhf/Dockerfile

@@ -28,6 +28,9 @@ WORKDIR /home/app
 
 COPY --from=build /go/src/handler/handler    .
 COPY --from=build /usr/bin/fwatchdog         .
+COPY --from=build /go/src/handler/function/  .
+
+RUN chown -R app /home/app
 
 USER app
 

template/golang-http/Dockerfile

@@ -28,6 +28,9 @@ WORKDIR /home/app
 
 COPY --from=build /go/src/handler/handler    .
 COPY --from=build /usr/bin/fwatchdog         .
+COPY --from=build /go/src/handler/function/  .
+
+RUN chown -R app /home/app
 
 USER app