Add Dockerfile

Dockerfile

@@ -0,0 +1,11 @@
+FROM alpine:edge
+ENTRYPOINT ["/bin/matterbridge"]
+
+COPY . /go/src/github.com/42wim/matterbridge
+RUN apk update && apk add go git \
+        && cd /go/src/github.com/42wim/matterbridge \
+        && export GOPATH=/go \
+        && go get \
+        && go build -o /bin/matterbridge \
+        && rm -rf /go \
+        && apk del --purge git go