feat(Dockerfile) expose UDP 4002 for swarm traffic

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>

Dockerfile

@@ -4,7 +4,7 @@ MAINTAINER Brian Tiger Chow <btc@perfmode.com>
 COPY . /go/src/github.com/jbenet/go-ipfs
 RUN cd /go/src/github.com/jbenet/go-ipfs/cmd/ipfs && go install
 
-EXPOSE 4001 5001
+EXPOSE 4001 5001 4002/udp
 
 ENTRYPOINT ["ipfs"]
 
@@ -12,3 +12,4 @@ CMD ["daemon", "--init"]
 
 # build:    docker build -t go-ipfs .
 # run:      docker run -p 4001:4001 -p 5001:5001 go-ipfs:latest daemon --init
+# run:      docker run -p 4002:4002/udp -p 4001:4001 -p 5001:5001 go-ipfs:latest daemon --init