refactor(backend): switch to empty buildpack for package, extend supported OS versions (#10705)

* bump vers

* fix ssl?

Added build dependencies for libbz2, libffi, and libssl.

* try empty buildpack

* clean up

* fix ref

* remove things we now do not need anymore

* add 22.04 as a target

* cleanup installer

* add changelog entry

* add dotenv

* update skript

* make task more robust for package usage

* ensure we have a site-url set

* fix style

* fix syntax

tasks.py

@@ -1728,7 +1728,7 @@ def frontend_download(
         # if clean, delete static/web directory
         if clean:
             shutil.rmtree(dest_path, ignore_errors=True)
-            dest_path.mkdir()
+            dest_path.mkdir(parents=True, exist_ok=True)
             info(f'Cleaned directory: {dest_path}')
 
         # unzip build to static folder
@@ -1792,6 +1792,7 @@ def frontend_download(
     # if zip file is specified, try to extract it directly
     if file:
         handle_extract(file)
+        static(c, frontend=False, skip_plugins=True)
         return
 
     # check arguments