add compression of js/css assets

requirements.txt

@@ -32,3 +32,4 @@ bleach==6.0.0
 numpy==1.24.4
 python-slugify==8.0.1
 djlint==1.34.1
+flask-squeeze==3.1.0

templates/templates/base.html

@@ -24,7 +24,7 @@
 
     <script src="{{ versioned_static('js/src/navigation.js') }}" defer></script>
     <script src="{{ versioned_static('js/dist/main.js') }}" defer></script>
-    <script src="{{ versioned_static('js/src/infer-preferred-language.js')}}"></script>
+    <script src="{{ versioned_static('js/src/infer-preferred-language.js')}}" defer></script>
 
     <link rel="stylesheet" type="text/css" media="screen" href="{{ versioned_static("css/styles.css") }}" />
     <link rel="stylesheet" type="text/css" media="print" href="{{ versioned_static("css/print.css") }}" />

webapp/app.py

@@ -12,6 +12,7 @@
 import talisker.requests
 from jinja2 import ChoiceLoader, FileSystemLoader
 from pathlib import Path
+from flask_squeeze import Squeeze
 
 from canonicalwebteam.blog import BlogAPI, BlogViews, build_blueprint
 from canonicalwebteam.discourse import (
@@ -184,6 +185,10 @@
     static_folder="../static",
 )
 
+# Compress JS and CSS
+squeeze = Squeeze()
+squeeze.init_app(app)
+
 # ChoiceLoader attempts loading templates from each path in successive order
 loader = ChoiceLoader(
     [