ruby: add docker files

web/documentserver-example/ruby/Dockerfile

@@ -0,0 +1,23 @@
+FROM ruby:3.2.2-alpine3.18 AS example-base
+WORKDIR /srv
+COPY . .
+RUN \
+	apk update && \
+	apk add --no-cache \
+		build-base \
+		gcompat \
+		git \
+		make \
+		nodejs && \
+	gem install bundler -v 2.3.7
+
+FROM example-base AS example-dev
+RUN make dev
+CMD ["make", "server-dev"]
+
+FROM example-base AS example-prod
+RUN make prod
+CMD ["make", "server-prod"]
+
+FROM nginx:1.23.4-alpine3.17 AS proxy
+COPY proxy/nginx.conf /etc/nginx/nginx.conf