Merge pull request tsl0922#4 from yugabyte/kcox/alpine

Update alpine container to build.

Dockerfile

@@ -9,14 +9,12 @@ WORKDIR build
 RUN cmake ..
 RUN make && make install
 
-FROM ubuntu:20.04 as runner
+FROM alpine as runner
 
 ARG TARGETARCH
-ARG DEBIAN_FRONTEND=noninteractive
 
 COPY --from=builder /usr/local/bin/ttyd /usr/bin/ttyd
-RUN apt-get update && apt-get install -y --no-install-recommends tini libjson-c-dev \
-    libwebsockets-dev && rm -rf /var/lib/apt/lists/*
+RUN apk add --no-cache bash tini
 
 EXPOSE 7681
 WORKDIR /root

Dockerfile.alpine

@@ -1,7 +1,17 @@
-FROM alpine
+FROM ubuntu:20.04 as builder
 
-ARG TARGETARCH
-COPY ./dist/${TARGETARCH}/ttyd /usr/bin/ttyd
+ARG DEBIAN_FRONTEND=noninteractive
+
+RUN apt-get update && apt-get install -y build-essential cmake git libjson-c-dev libwebsockets-dev
+COPY . .
+RUN mkdir build
+WORKDIR build
+RUN cmake ..
+RUN make && make install
+
+FROM alpine as runner
+
+COPY --from=builder /usr/local/bin/ttyd /usr/bin/ttyd
 RUN apk add --no-cache bash tini
 
 EXPOSE 7681