Simplify frontend assests and build steps

We just write the files directly in the public dir
Then change the npm scripts to lint and compress them directly

scripts/compress.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env zsh
+
+if ! type brotli &> /dev/null; then
+    echo "brotli not installed"
+    exit 1
+fi
+
+for file in ./public/assets/css/*.css
+do
+    brotli --force --quality=11 --output=$file.br -- $file
+done
+
+for file in ./public/assets/js/*.js
+do
+    brotli --force --quality=11 --output=$file.br -- $file
+done