add line webhook router

Dockerfile

@@ -0,0 +1,14 @@
+FROM golang:1.11-alpine3.8 as builder
+WORKDIR /go/src/git.trj.tw/golang/mtgbot
+RUN apk add --no-cache make git \
+  && go get -u github.com/otakukaze/go-bindata/...
+COPY . .
+RUN make
+
+FROM alpine:latest
+RUN apk add --no-cache ca-certificates
+WORKDIR /data
+COPY --from=builder /go/src/git.trj.tw/golang/mtgbot/mtgbot /usr/bin
+COPY config.sample.yml config.yml
+EXPOSE 10230
+CMD ["/usr/bin/mtgbot", "-f", "/data/config.yml", "-dbtool"]