Merge pull request #86 from pion/issue-79

Reduce ion-web size

docker/web.Dockerfile

@@ -1,25 +1,22 @@
-FROM node:12.16.0-buster-slim
+FROM alpine
 
-WORKDIR /app
-COPY ./sdk/js/package.json ./
-RUN npm install
-
-COPY ./sdk/js/demo/package.json ./demo/
-WORKDIR /app/demo
-RUN npm install
-
-WORKDIR /app
-COPY ./sdk/js ./
-
-WORKDIR /app/demo
-RUN npm run build
+ENV ENABLE_TELEMETRY="false"
+WORKDIR /usr/src/ion
 
-RUN apt-get update && apt-get install -y \
-    curl \
- && rm -rf /var/lib/apt/lists/*
+COPY ./sdk/js /usr/src/ion
+RUN apk add --no-cache --update nodejs npm \
+  && mkdir -p /app/demo \
+  && npm install \
+  && cd demo  \
+  && npm install \
+  && npm run build \
+  && mv dist /app/demo \
+  && rm -rf /usr/src/ion /root/.npm /tmp/* \
+  && apk del --no-cache nodejs npm
 
-ENV ENABLE_TELEMETRY="false"
-RUN curl https://getcaddy.com | bash -s personal
+RUN apk add --no-cache --update curl bash \
+    && curl https://getcaddy.com | bash -s personal \
+    && apk del --no-cache curl bash
 
 ENTRYPOINT ["/usr/local/bin/caddy"]
 CMD ["--conf", "/etc/Caddyfile", "--log", "stdout", "--agree=true"]