Add experimental watchdog

data/Dockerfiles/watchdog/Dockerfile

@@ -0,0 +1,22 @@
+FROM alpine:3.6
+
+LABEL maintainer "André Peters <andre.peters@servercow.de>"
+
+# Installation
+RUN apk add --update \
+	&& apk add --no-cache nagios-plugins-smtp \
+	nagios-plugins-tcp \
+	nagios-plugins-http \
+	nagios-plugins-ping \
+	curl \
+	bash \
+	jq \
+	fcgi \
+	nagios-plugins-mysql \
+	nagios-plugins-dns \
+	bind-tools
+
+COPY watchdog.sh /watchdog.sh
+
+# Less verbose
+CMD /watchdog.sh 2> /dev/null