Add a summary of our general Tech Infrastructure

docs/infrastructure/README.md

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+# Overview
+
+Student Robotics has a variety of infrastrcture in order to support its mission.
+This document aims to provide an outline of the general structure.
+
+Currently our infrastructure as a whole does not have a designed owner, instead
+individual pieces are looked after by volunteer Teams or just by volunteers who
+have historically maintained them.
+
+## Website
+
+Our website consists of a main public facing site at https://studentrobotics.org
+as well as a collection of other sites which appear at various paths off the
+root domain. This runbook is an example of such a sub-site, as are the
+competitor-facing documentation which appears at [`/docs`][slash-docs].
+
+These sub sites (and the main website itself) are hosted as GitHub Pages, with a
+separate NGINX instance acting as a [reverse-proxy][reverse-proxy] to facade
+these and other services onto the root domain. Currently we use Digital Ocean
+for the hosting of our [infrastructure][infrastructure] as well as for DNS and
+TLS termination. Our domains are registered with Namecheap.
+
+[slash-docs]: https://studentrobotics.org/docs
+[reverse-proxy]: https://github.com/srobo/reverse-proxy
+[infrastructure]: https://github.com/srobo/infrastructure
+
+### Competitor Services
+
+During the competition, there are a number of [hosted services](./competitor-services.md)
+which the competitors use. These have thier own managed configuration and are
+typically hosted for the duration of the competition "year" only.
+
+### Competition Services
+
+During the competition event we use the [SRComp suite][srcomp-suite] of tools to
+help run the matches, including a VM to host a public-facing copy of the HTTP
+API for use on the website.
+
+[srcomp-suite]: https://github.com/PeterJCLaw/srcomp/wiki
+
+## Development: GitHub
+
+A lot of our collaborative work (including hardware and software development, as
+well as general task management) takes place [on GitHub][git-and-github], within our
+[`srobo`](https://github.com/srobo) organisation.
+
+We also have a separate [`srobo-legacy`](https://github.com/srobo-legacy)
+organisation which contains some archived git repositories that pre-date our use
+of GitHub. Moving these over to the main organisation and de-duplicating the
+repositories is an [ongoing project][legacy-repository-migration].
+
+[git-and-github]: ../volunteering/git-and-github.md
+[legacy-repository-migration]: https://github.com/srobo/tasks/issues/179
+
+## Email, Documents: Google
+
+For our email (`@studentrobotics.org`) accounts as well as document sharing we
+use Google's G-Suite. Google Groups are used for various mailing lists.
+
+## External mailing lists: Mailchimp
+
+For sending some batch emails we use Mailchimp.

docs/infrastructure/competitor-services.md

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+# Competitor Services
+
+During the competition season, there are a number of hosted services which the
+competitors use. These are [managed using `puppet`][server-puppet] to configure
+a "competitor services" VM, typically within Digital Ocean.
+
+[server-puppet]: https://github.com/srobo/server-puppet/
+
+The services typically include:
+
+**Forums**
+:   A space which the competitors can use to chat with each other and with
+    mentors and to ask for help with developing their robots.
+    Historically we have used [PHPBB](https://phpbb.com), though for SR2021 we
+    have moved to using Discord with a bot to [gate entry](discord-gated-entry).
+
+**[IDE](https://github.com/srobo/srobo-ide/)**
+:   A hosted web-based environment which allows competitors to develop code for
+    their robots without needing to install anything on their own computers.
+
+**User accounts**
+:   User accounts are needed for access to the IDE and our self-hosted forums.
+    We also host a [management interface](https://github.com/srobo/nemesis/) so
+    that team-leaders can administer the user-accounts of their teams.
+
+**Ticket access**
+:   At the physical competition we gate entry through the use of tickets which
+    competitors download from the website ahead of time.
+
+**[Code submitter](https://github.com/PeterJCLaw/code-submitter/)**
+:   For the virtual competitions, this is a mechanism for competitors to submit
+    the code for their virtual robots.
+
+
+[discord-gated-entry]: https://github.com/srobo/discord-gated-entry/