Duplicate headers in a single Markdown document are problemlematic
because the auto-generated links won't be stable. Enable this rule with
no exceptions which is also the default of `markdownlint`. For example:
```md
# A
## Example
# B
## Example
```
Docasaurus will generated `example` and `example-1` links for this. If
the first heading is altered, the link `example` will unexpectedly move
to the second example heading.
Ref: https://github.com/go-gitea/gitea/pull/27461#discussion_r1347987659
- MySQL 5.7 support and testing is dropped
- MySQL tests now execute against 8.1, up from 5.7 and 8.0
- PostgreSQL 10 and 11 support ist dropped
- PostgreSQL tests now execute against 16, up from 15
- MSSQL 2008 support is dropped
- MSSQL tests now run against locked 2022 version
Fixes: https://github.com/go-gitea/gitea/issues/25657
Ref: https://endoflife.date/mysql
Ref: https://endoflife.date/postgresql
Ref: https://endoflife.date/mssqlserver
## ⚠️ BREAKING ⚠️
Support for MySQL 5.7, PostgreSQL 10 and 11, and MSSQL 2008 is dropped.
You are encouraged to upgrade to supported versions.
---------
Co-authored-by: techknowlogick <techknowlogick@gitea.com>
This PR cleans up the docs in a way to make them simpler to ingest by
our [docs repo](https://gitea.com/gitea/gitea-docusaurus).
1. It includes all of the sed invocations our ingestion did, removing
the need to do it at build time.
2. It replaces the shortcode variable replacement method with
`@variable@` style, simply for easier sed invocations when required.
3. It removes unused files and moves the docs up a level as cleanup.
---------
Signed-off-by: jolheiser <john.olheiser@gmail.com>
