Merge branch 'new-deps' into 'main'

mention the various system libraries we need

See merge request !57

content/en/docs/install/fresh.md

@@ -116,6 +116,9 @@ Prerequisites:
 * FFmpeg
 * all the various packages to compile and build C code, and Python (on
   Debian-style systems, that's `build-essential` & `python`)
+* some system libraries and their development headers: pango, cairo,
+  pixman (on Debian-style systems, that's `libpango1.0-dev
+  libcairo2-dev libpixman-1-dev`)
 
 Create a `sharkey` user:
 
@@ -450,6 +453,11 @@ needs Node.js 22.11, and you will almost certainly need to run `pnpm
 run clean-all` before `pnpm install`, otherwise you'll end up with
 some dependencies (e.g. `re2`) linked to the wrong libraries.
 
+**NOTE**: if you upgrading from 2024.11.2 or earlier, Sharkey now
+needs some system libraries and their development headers: pango,
+cairo, pixman (on Debian-style systems, that's `libpango1.0-dev
+libcairo2-dev libpixman-1-dev`)
+
 ### Caching issues
 
 It's possible that the web server (or the CDN, if you've configured

content/en/docs/install/migrate/misskey.md

@@ -39,6 +39,10 @@ pnpm run migrate
 Also, clear your browser's cache and local storage (this will log your
 browser out of Misskey/Sharkey).
 
+**NOTE**: Sharkey 2025.2.2 and later needs some system libraries and
+their development headers: pango, cairo, pixman (on Debian-style
+systems, that's `libpango1.0-dev libcairo2-dev libpixman-1-dev`)
+
 ### Using Docker
 
 If you are using the `docker-compose.yml` file from Misskey which builds locally follow these steps: