Enable routing to Alexa functions

Add first Alexa-compatible function HostnameIntent

sample-functions/HostnameIntent/Dockerfile

@@ -0,0 +1,11 @@
+FROM alpine:latest
+RUN apk --update add nodejs
+COPY ./fwatchdog /usr/bin/
+
+COPY package.json   .
+COPY handler.js     .
+COPY sample.json    .
+
+RUN npm i
+ENV fprocess="node handler.js"
+CMD ["fwatchdog"]