lume: update to v2

* Update lume to v2
* Update deno to v1.41.3
* Use vento instead of nunjucks for templating
* Use markdown for page data
* Fix english translation of homepage
* Fix asset build
* Make images responsive

README.md

@@ -26,7 +26,7 @@ direnv allow
 Just build the static site, results are in `_site`:
 
 ```
-./build.sh
+deno task build
 ```
 
 To get a live development server, run: