Make Dockerfile more generic

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

commands/new_function.go

@@ -90,14 +90,20 @@ the "Dockerfile" lang type in your YAML file.
 	if strings.ToLower(lang) != "dockerfile" {
 		builder.CopyFiles("./template/"+lang+"/function/", "./"+functionName+"/", true)
 	} else {
-		ioutil.WriteFile("./"+functionName+"/Dockerfile", []byte(`# Use any image as your base image, or "scratch"
+		ioutil.WriteFile("./"+functionName+"/Dockerfile", []byte(`FROM alpine:3.6
+# Use any image as your base image, or "scratch"
 # Add fwatchdog binary via https://github.com/openfaas/faas/releases/
 # Then set fprocess to the process you want to invoke per request - i.e. "cat" or "my_binary"
 
-# FROM ...
-# ADD https://...
-# ENV fprocess=./my_binary
-# CMD ["fwatchdog"]
+ADD https://github.com/openfaas/faas/releases/download/0.6.7/fwatchdog /usr/bin
+# COPY ./fwatchdog /usr/bin/
+RUN chmod +x /usr/bin/fwatchdog
+
+# Populate example here - i.e. "cat", "sha512sum" or "node index.js"
+ENV fprocess="wc -l"
+
+HEALTHCHECK --interval=5s CMD [ -e /tmp/.lock ] || exit 1
+CMD ["fwatchdog"]
 `), 0600)
 	}