add Dockerfile and configure production app

Dockerfile

@@ -0,0 +1,50 @@
+FROM ruby:3.2.2-alpine as webpack
+
+ENV RAILS_ENV=production
+ENV NODE_ENV=production
+
+WORKDIR /app
+
+RUN apk add --no-cache nodejs yarn git build-base && \
+    gem install shakapacker
+
+COPY ./package.json ./yarn.lock ./
+
+RUN yarn install --network-timeout 1000000
+
+COPY ./bin/shakapacker ./bin/shakapacker
+COPY ./config/webpack ./config/webpack
+COPY ./config/shakapacker.yml ./config/shakapacker.yml
+COPY ./postcss.config.js ./postcss.config.js ./
+COPY ./tailwind.config.js ./tailwind.config.js ./
+COPY ./tailwind.form.config.js ./tailwind.form.config.js ./
+COPY ./tailwind.application.config.js ./tailwind.application.config.js ./
+COPY ./app/javascript ./app/javascript
+COPY ./app/views ./app/views
+
+RUN echo "gem 'shakapacker'" > Gemfile && ./bin/shakapacker
+
+FROM ruby:3.2.2-alpine as app
+
+ENV RAILS_ENV=production
+ENV BUNDLE_WITHOUT="development:test"
+
+WORKDIR /app
+
+RUN apk add --no-cache build-base sqlite-dev libpq-dev vips-dev vips-poppler vips-heif libc6-compat ttf-freefont
+
+COPY ./Gemfile ./Gemfile.lock ./
+
+RUN bundle update --bundler && bundle install && rm -rf ~/.bundle
+
+COPY . ./
+
+COPY --from=webpack /app/public/packs ./public/packs
+
+RUN bundle exec bootsnap precompile --gemfile app/ lib/
+
+WORKDIR /data/docuseal
+ENV WORKDIR=/data/docuseal
+
+EXPOSE 3000
+CMD ["/app/bin/rails", "server"]