Update Dockerfile

Dockerfile

@@ -1,2 +1,20 @@
-FROM besutkode/gotty
-CMD ["/bin/bash" "/run_gotty.sh"]
+FROM node:16 as js-build
+WORKDIR /gotty
+COPY js /gotty/js
+COPY Makefile /gotty/
+RUN make bindata/static/js/gotty.js.map
+
+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:latest
+RUN apk update && \
+    apk upgrade && \
+    apk --no-cache add ca-certificates bash
+WORKDIR /root
+COPY --from=go-build /gotty/gotty /usr/bin/
+CMD ["gotty",  "-w", "bash"]