add docker file

Dockerfile

@@ -0,0 +1,17 @@
+FROM heroku/heroku:16
+LABEL maintainer michel.promonet@free.fr
+
+WORKDIR /v4l2rtspserver
+ADD . /v4l2rtspserver
+
+RUN git clone --depth 1 https://github.com/mpromonet/v4l2tools.git
+RUN apt-get update && apt-get install -y --no-install-recommends g++ autoconf automake libtool xz-utils cmake liblivemedia-dev liblog4cpp5-dev libx264-dev libjpeg-dev v4l2loopback-dkms 
+
+RUN cmake . && make \
+	&& make -C v4l2tools \
+	&& apt-get clean
+
+EXPOSE 8554
+
+ENTRYPOINT [ "./v4l2rtspserver" ]
+CMD [ "-S -P ${PORT}" ]