Build websites inside docker multi-stage build

caddy/Dockerfile

@@ -1,9 +1,19 @@
+## Docker multi-stage build
+
+## Generate api documentation
+FROM quay.io/bukalapak/snowboard AS docbuilder
+RUN mkdir /out
+COPY api-doc /doc
+RUN /app/packages/snowboard/bin/run html api.apib -o /out
+
+## Generate website
+FROM node:latest AS builder
+COPY frontend /app
+WORKDIR /app
+RUN yarn install && yarn run generate
+
+## Main image
 FROM caddy:2.0.0
-
-COPY caddy/Caddyfile.prod /etc/caddy/Caddyfile
-
-# Copy main website
-COPY frontend/dist /site
-
-# Copy api docs website
-COPY public /docs
+COPY caddy/Caddyfile /etc/caddy/Caddyfile
+COPY --from=docbuilder /out /docs
+COPY --from=builder /app/dist /site