Upgrade from node-sass to latest sass, drop custom docker image

.platform.app.yaml

@@ -25,7 +25,7 @@ disk: 1024
 
 dependencies:
   nodejs:
-    node-sass: '^4.9.4'
+    sass: '^1.85'
   php:
     composer/composer: '^2'
 

bin/build-sass.sh

@@ -2,7 +2,7 @@
 
 set -e
 
-node-sass \
-  --output-style=compressed \
+npx --yes sass \
+  --style=compressed \
   source/_sass/all.scss \
   output_dev/css/all.css

docker-compose.yml

@@ -29,14 +29,8 @@ services:
     entrypoint: 'sh'
 
   node-sass:
-    image: catchdigital/node-sass:8.12.0-alpine
+    image: node:22-alpine
     user: 1000:1000
     working_dir: /fig-website
     volumes:
       - .:/fig-website
-    command:
-      - 'node-sass'
-      - '--output-style=compressed'
-      - '--watch'
-      - 'source/_sass/all.scss'
-      - 'output_dev/css/all.css'