Add changelog and fix docs

Changelog.md

@@ -1,5 +1,55 @@
 # Changelog
 
+## v0.34.0
+
+*Mar 31, 2022*
+
+- French translation (#1440): The UI is now available in French!
+  Thanks to @jgirardet.
+- Link Items (#528): Link items together directly (without using
+  custom fields) and see all related items quickly on the search page.
+- Import mails recursively (#1260): The scanmailbox task can now go
+  through folders recursively. Thanks to @Moerfi666 and @seijikun.
+- Fulltext search via PostgreSQL (#424): Another backend for full-text
+  search was added that is backed by PostgreSQL's text search feature.
+  You can now choose between SOLR and PostgreSQL for fulltext search.
+- More file backends (#1379): Next to storing the files in the
+  database, you can now choose to store them in a S3 compatible
+  storage or use the filesystem directly.
+- Flat zip upload (#1366): An option has been added to the upload
+  metadata that will unpack zip files and process each entry
+  separately (instead of treating a zip file as a single item).
+- Fix to upload large files (#1339): Uploaded files are not loaded
+  entirely into memory allowing to upload large files.
+- Fix previously published db migration (#1454, #1436): Unfortunately,
+  there was an db migration in the last release that caused problems
+  on some installations. A fix for this migration has been added.
+- Fix build to run on windows (#1449, #1461): Building docspell on
+  windows has been improved by @arittner.
+
+For some of the new features, you need the new version of
+[dsc](https://github.com/docspell/dsc).
+
+### Rest API Changes
+
+- adds routes to clone file repositories and the integrity check
+- adds routes to support linking items
+- `ScanMailboxSettings` has a new flag `scanRecursively`
+- `ItemDetail` and `ItemLight` contain a new field to transport
+  related/linked items
+- `ItemUploadMeta` has a new flag to specify whether zip files should
+  be treated as a container only, and be "flattened" into the list of
+  uploaded files
+
+### Configuration Changes
+
+- rest server only: added options to tune the http server
+- joex only: adds a file integrity check to the regular house keeping tasks
+- configuration for postgresql based full-text search
+- extend `files` config adding the different storage backends for
+  files
+
+
 ## v0.33.0
 
 *Mar 6, 2022*