chore: harmonisation flotte (ignores legacy/ eslint/prettier/dockerignore, garde-fou vite watch.ignored, Dockerfile npm ci)

.prettierignore

@@ -6,3 +6,4 @@ coverage/*
 data/*
 /dist/
 tsconfig.tsbuildinfo
+legacy/*

eslint.config.js

@@ -28,7 +28,7 @@ export default [
     pluginimport.flatConfigs.recommended,
 
     {
-        ignores: ['dist/', 'node_modules/', 'web/', 'public/', 'coverage/', 'data/', 'vendor/', 'react/', 'js/', 'assets/', '**/old/'],
+        ignores: ['legacy/', 'dist/', 'node_modules/', 'web/', 'public/', 'coverage/', 'data/', 'vendor/', 'react/', 'js/', 'assets/', '**/old/'],
     },
     {
         languageOptions: {