Update Dockerfile

Dockerfile

@@ -1,20 +1,14 @@
-FROM node:16 as js-build
-WORKDIR /gotty
-COPY js /gotty/js
-COPY Makefile /gotty/
-RUN make bindata/static/js/gotty.js.map
+FROM ubuntu:18.04
+RUN apt-get update && apt-get install -y autoconf automake curl cmake git libtool make \
+    && git clone --depth=1 https://github.com/tsl0922/ttyd.git /ttyd \
+    && cd /ttyd && env BUILD_TARGET=x86_64 ./scripts/cross-build.sh
 
-FROM golang:1.16 as go-build
-WORKDIR /gotty
-COPY . /gotty
-COPY --from=js-build /gotty/js/node_modules /gotty/js/node_modules
-COPY --from=js-build /gotty/bindata/static/js /gotty/bindata/static/js
-RUN CGO_ENABLED=0 make
+FROM alpine
+COPY --from=0 /ttyd/build/ttyd /usr/bin/ttyd
+RUN apk add --no-cache bash tini
 
-FROM alpine:latest
-RUN apk update && \
-    apk upgrade && \
-    apk --no-cache add ca-certificates bash
+EXPOSE 7681 4040 80
 WORKDIR /root
-COPY --from=go-build /gotty/gotty /usr/bin/
-CMD ["gotty",  "-w", "bash"]
+
+ENTRYPOINT ["/sbin/tini", "--"]
+CMD ["ttyd", "--writable",  "-s", "3", "bash"]