Use nokogiri system libs

Dockerfile

@@ -1,5 +1,5 @@
 FROM ruby:3-alpine
-RUN apk add --no-cache ruby-bundler build-base
+RUN apk add --no-cache ruby-bundler build-base libxml2-dev libxslt-dev
 RUN echo -e "#!/bin/sh\ncd /nanoleaf;./main.rb >> /var/log/nanoleaf" > /etc/periodic/15min/nanoleaf
 RUN chmod +x /etc/periodic/15min/nanoleaf
 RUN adduser -DHu 1001 nanoleaf
@@ -11,5 +11,6 @@ COPY --chown=1001 ["main.rb", "Gemfile", "effect.json", "/nanoleaf/"]
 ENV HOME="/tmp/"
 ENV GEM_HOME="/nanoleaf/vendor/bundle"
 ENV PATH $GEM_HOME/bin:$GEM_HOME/gems/bin:$PATH
+RUN bundle config build.nokogiri --use-system-libraries
 RUN bundle install
 CMD ./main.rb >> /var/log/nanoleaf & tail -F /var/log/nanoleaf