Added first cut of Dockerfile for building rtl-ais

Dockerfile

@@ -0,0 +1,24 @@
+FROM debian:stretch-slim
+
+ENV VER=${VER:-master} \
+    REPO=https://github.com/dgiardini/rtl-ais.git \
+    APP=/usr/src/app \
+    GIT_SSL_NO_VERIFY=true
+
+WORKDIR $APP
+
+RUN apt-get update && apt-get install -y \
+git \
+rtl-sdr \
+librtlsdr-dev \
+make \
+build-essential \
+pkg-config \
+libusb-1.0-0-dev \
+&&  git clone -b $VER $REPO $APP \
+&&  make
+
+CMD $APP/rtl_ais -n
+
+#EXPOSE 10110/udp
+