* Enable puma clustered (#654)

    Enable puma clustered mode to process more requests and reduce latency

* Use a volume to deal with bundled gems (#640)

    This way we don't need to rebuild everytime we add/update/remove a gem

* Improve organization in contact/restroom models (#653)

  * Remove unused git keep from models

  * Improve identation/organization of Contact form

  * Improve Restroom model organization by grouping method kinds

* Update dependencies for early March 2021 (#658)

  * Dockerfile: Update NodeJS to version 14

  * yarn.lock: Bump ini from v1.3.5 to v1.3.8

  * yarn.lock: Bump dompurify from v2.0.8 to v2.2.6

  * Gemfile.lock: Bump nokogiri from 1.10.10 to 1.11.1

  * Gemfile[.lock]: Update rails to v5.2.4.5

      Was version 5.2.4.4 (this is a patch version bump)

  * Ruby: Update from 2.5.8 to 2.6.6

  * Gemfile[.lock]: Update webmock (v3.2.1 to v3.12.1)

      Also update its transitive dependencies,
      within ranges allowed by Gemfile.

  * Ruby: Update from 2.6.6 to 2.7.1

  * Ruby: Update from 2.7.1 to 2.7.2

  * Gemfile.lock: Update puma from 5.0.2 to 5.2.2

  * yarn.lock: Update elliptic from v6.5.3 to v6.5.4

  * Revert "Enable puma clustered (#654)" (#659)

      This reverts commit 6c63546.

      We don't know for sure that we need these speed/latency gains,
      and maintenance bandwidth is low for the project.

      We don't want to potentially have to track down bugs,
      or undo any damage done, so revert this change for now.

Co-authored-by: Bruno Casali <[email protected]>