fix: install all yarn dependencies

Dockerfile

@@ -30,7 +30,7 @@ RUN git config --global --add safe.directory /var/www/discourse &&\
     # sudo -u discourse bundle config --local jobs 4 && \
     # sudo -u discourse bundle install &&\
     # yarn install --frozen-lockfile
-    sudo -u discourse yarn install --production &&\
+    sudo -u discourse yarn install --frozen-lockfile  &&\
     sudo -u discourse yarn cache clean &&\
     find /var/www/discourse/vendor/bundle -name tmp -type d -exec rm -rf {} + &&\
     chown -R discourse:discourse /var/www/discourse