Add healthcheck to markdown for ARMHF

docker-compose.armhf.yml

@@ -75,8 +75,6 @@ services:
         environment:
             no_proxy:   "gateway"
             https_proxy: $https_proxy
-
-
     wordcount:
         image: functions/alpine:latest-armhf
         labels:
@@ -89,6 +87,19 @@ services:
             fprocess:   "wc"
             no_proxy:   "gateway"
             https_proxy: $https_proxy
+    echoit:
+        image: functions/alpine:latest-armhf
+        labels:
+            function: "true"
+        depends_on:
+            - gateway
+        networks:
+            - functions
+        environment:
+            fprocess:   "cat"
+            no_proxy:   "gateway"
+            https_proxy: $https_proxy
+
 networks:
     functions:
         driver: overlay

sample-functions/MarkdownRender/Dockerfile.armhf

@@ -1,6 +1,6 @@
 FROM armhf/alpine:3.5
 
-ADD https://github.com/alexellis/faas/releases/download/v0.5-alpha/fwatchdog-armhf /usr/bin/fwatchdog
+ADD https://github.com/alexellis/faas/releases/download/0.5.4-alpha/fwatchdog-armhf /usr/bin/fwatchdog
 RUN chmod +x /usr/bin/fwatchdog
 
 WORKDIR /root/
@@ -12,4 +12,6 @@ ENV https_proxy     ""
 COPY app    .
 
 ENV fprocess="/root/app"
+
+HEALTHCHECK --interval=5s CMD [ -e /tmp/.lock ] || exit 1
 CMD ["fwatchdog"]