ci: add dockerfile

Dockerfile

@@ -0,0 +1,23 @@
+FROM ubuntu:latest AS build
+
+ENV DEBIAN_FRONTEND=noninteractive
+RUN apt update && apt install build-essential git libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev cmake make wget xz-utils git build-essential libssl-dev openssl -y
+
+RUN git clone https://github.com/irlserver/srt.git 
+RUN cd srt
+
+RUN mkdir /out
+RUN cmake -DCMAKE_INSTALL_PREFIX=/usr ./srt
+RUN make -j
+RUN make DESTDIR=/out install
+
+
+WORKDIR /belacoder
+COPY . .
+
+RUN mkdir /bela-out
+RUN make -j
+RUN make DESTDIR=/bela-out
+
+FROM scratch AS export
+COPY --from=build /bela-out /