Add changelog and clean up other docs

CHANGELOG.md

@@ -0,0 +1,47 @@
+# Changelog
+
+This document contains the version history of Ilmomasiina.
+
+## 2.0.0
+
+**Visible features**:
+
+- Interface is fully localized in Finnish and English
+- Events can be created without a signup, and signups can be created with no event date
+- Event descriptions support Markdown
+- Name and email questions can be removed
+- Users can choose whether their signup name is shown publicly
+- Signups can be viewed even after editing closes
+- Editable event slugs (instead of numeric IDs) in all user-visible URLs
+- Unlisted events (hidden from event list, but can be signed up to)
+- Admins can change their password and reset others' passwords
+- iCalendar export of event list (can be imported to e.g. Google Calendar)
+- Events have a category (can be filtered via API)
+- Quotas and questions can be reordered after creating an event
+- Admins are warned when changes to an event affect people already signed up
+- Installation experience is documented and smoother than previously
+
+**Major technical changes:**
+
+- Entire project ported to TypeScript
+- Frontend and backend split to multiple packages
+- Backend ported to Fastify
+- Frontend built using Vite
+- NPM packages created for custom frontends/clients
+- Project builds as Docker container automatically
+- Dotenv support
+- Significantly expanded documentation
+
+**Other changes and fixes:**
+
+- Error messages are actually useful
+- "You got a spot from the queue" emails work consistently
+- Refreshing/navigating away from a new signup or typoing the email address no longer make the signup unreachable
+- Question options can contain semicolons
+- Editor performance improved
+- More thorough and configurable anonymization of old signups
+- Sequential database IDs are no longer visible to users
+- Deleted items are not stuck in the database forever
+- Signup state (quota/queue and position) is more consistent
+- Security vulnerabilities fixed
+- Numerous other bug fixes and improvements

README.md

@@ -1,13 +1,18 @@
 # Ilmomasiina
 
-Ilmomasiina is the event registration system originally created by Athene, forked by Tietokilta and currently under
-heavy development for our new site. Once finished, it will be available for all organizations to use, along with
-migration tools from the Athene-made version.
+Ilmomasiina is the event registration system originally created by Athene in 2016,
+and forked in 2021 by Tietokilta for our new website.
+There are [numerous major upgrades](./CHANGELOG.md) from the Athene version.
 
-The latest reviewed development version is in the `dev` branch.
+Ilmomasiina is easy to [install](docs/installation.md) in various environments and
+is freely available for all organizations to use.
+[Migrating](docs/migration.md) from the Athene-made version is also supported.
+
+The latest reviewed development version is in the `dev` branch. You may want to check
+current PRs for somewhat stable feature additions.
 
 **Please note that the code is currently in alpha phase and may still have bugs.**
-Major features for 2.0 are mostly done and we expect to reach beta in spring 2024.
+Major features for 2.0 are mostly done and we expect to reach a stable beta in spring 2024.
 
 ## Installation
 

docs/migration.md

@@ -5,7 +5,7 @@ This file documents the migration process from the Athene-created version of Ilm
 ## Migration script
 
 The below SQL script migrates the database schema. It is written for MySQL/MariaDB.
-Scripts for other databases will be created later.
+If you use PostgreSQL, let us know.
 
 There will be more automatic migration tools when we reach production, but the initial migration will likely stay
 as a script.