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diff --git a/dockerfiles/bootstrap.Dockerfile b/dockerfiles/bootstrap.Dockerfile
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+# This is the Nanoc bootstrap Dockerfile which builds an image that contains
+# all Nanoc's runtime dependencies and gems.
+
+#
+# Build minifier utility
+# Adapted from https://github.com/docker/docker.github.io/blob/publish-tools/Dockerfile.builder
+#
+FROM golang:1.13-alpine AS minifier
+RUN apk add --no-cache git
+RUN export GO111MODULE=on \
+  && go get -d github.com/tdewolff/minify/v2@latest \
+  && go build -v -o /minify github.com/tdewolff/minify/cmd/minify
+
+#
+# Image that contains all needed dependencies
+#
+FROM registry.gitlab.com/gitlab-org/gitlab-docs:base
+
+# Copy only the Gemfiles and yarn.lock to install the dependencies
+COPY /Gemfile* /source/
+COPY /yarn.lock /source/
+WORKDIR /source
+
+# Install gems and node libraries
+RUN NOKOGIRI_USE_SYSTEM_LIBRARIES=1 bundle install --jobs 4 && \
+    yarn install && \
+    yarn cache clean
+
+# Copy scripts used for static HTML post-processing
+COPY scripts /scripts/
+COPY --from=minifier /minify /usr/local/bin/minify
+
+CMD ["echo 'Nothing to do here. This is the bootstrap image that contains all dependencies to build the docs site.'"]