For those who need smaller images with alpine

Building-a-docker-image-with-nginx--rtmp-module.md

@@ -1,5 +1,7 @@
 Create a `Dockerfile` with the following:
 
+#### Ubuntu
+
 ```Dockerfile
 FROM ubuntu:xenial
 
@@ -40,4 +42,22 @@ VOLUME ["/etc/nginx", "/var/cache/nginx"]
 
 CMD ["nginx", "-g", "daemon off;"]
 ```
+
+#### Alpine
+
+```Dockerfile
+FROM alpine:3.13.4 as builder
+RUN apk add --update build-base git bash gcc make g++ zlib-dev linux-headers pcre-dev openssl-dev
+RUN git clone https://github.com/arut/nginx-rtmp-module.git && \
+    git clone https://github.com/nginx/nginx.git
+RUN cd nginx && ./auto/configure --add-module=../nginx-rtmp-module && make && make install
+
+FROM alpine:3.13.4 as nginx
+RUN apk add --update pcre ffmpeg
+COPY --from=builder /usr/local/nginx /usr/local/nginx
+ADD border.conf /usr/local/nginx/conf/nginx.conf
+ENTRYPOINT ["/usr/local/nginx/sbin/nginx"]
+CMD ["-g", "daemon off;"]
+```
+
 now build as you normally would, any other `Dockerfile`