add changelog

CHANGELOG.md

@@ -0,0 +1,58 @@
+# Changelog
+
+c3nav does not exactly have a versioning scheme. 
+
+This file aims to give you an idea of what has changed between events where c3nav was used or supported by the
+development team. These lists do not aim to be complete but help you get an overview about the most iportant changes
+and potential backwards incompatibilities.
+
+# 38. Chaos Communication Congress (development ongoing)
+
+- data overlay support
+- complete rewrite of editor changesets as a base for a more modern editor
+
+# Eurofurence 28 ([hackmas2024](https://github.com/c3nav/c3nav/tree/ef28))
+
+- map key/legend including settings for it in the editor
+- SSO support for access permission management
+- bring back buttons to set moving positions
+- fix "show nearby"
+- more advanced theming support
+- prometheus updates
+- UwU support
+
+# Håck ma's Castle 2024 ([hackmas2024](https://github.com/c3nav/c3nav/tree/hackmas2024))
+
+- GPS support for positioning, support for defining a proj4 conversion string
+- turn "click anywhere" into a one-step process to make options more obvious
+- ramps can now have more than two altitudes and will be interpolated correctly, important for terrain
+- fixed redemption of signed access permission tokens 
+
+# Easterhegg 2024 ([eh2024](https://github.com/c3nav/c3nav/tree/eh2024))
+
+- theming support (introduces ObstacleGroups for colors, automatic data migration)
+- prometheus statistics export
+- more mesh support, still not done
+- create a step/question based report flow process
+- some fixes to editor changesets
+
+# 37. Chaos Communication Congress ([37c3](https://github.com/c3nav/c3nav/tree/37c3))
+
+- new OpenAPI-Compatible RESTful API v2
+- ground altitudes are now defined separately and can be re-used, data will be migrated automatically
+- rich links previews when sharing links to c3nav
+- editor SVG sources support
+- basic support for WiFi RTT measurements
+- imprint is now configured differently/externally
+- support for unlimited access permission tokens
+- import function from the c3 hub for assemblies and similar
+- areas can now have a main_point (only relevant for hub import, not available in the editor yet)
+- migrated from material icons to material symbols
+- levels do no longer need at least one hole to render properly
+- support PWA and native sharing functionalities
+- some modernization of front-end code, based on the new API, TypeScript support
+- initial c3nav mesh support for locator beacons (not finished)
+- modernized rendering code
+- zstd compression support for communication with tile server
+- updated docker deployment
+- ASGI support

README.md

@@ -5,6 +5,8 @@ indoor navigation for events. See it live at [c3nav.de](https://c3nav.de/).
 **Documentation for the current state is very limited. Sorry. Please do not refer to old documentation and report bugs about it not being accurate.**
 You may take a look at the [wiki](https://github.com/c3nav/c3nav/wiki). We try to answer questions as our limited time and energy permits.
 
+There is a [changelog](CHANGELOG.md) available with the most important changes done for every event.
+
 *Please note that this project is released with a [Code of Conduct](CODE_OF_CONDUCT.md) that applies to all project-related communication. By participating in this project you agree to abide by its terms.*
 
 *You can support c3nav development [on Patreon](https://www.patreon.com/c3nav).*