Fix entrypoint: copy .env.example before key:generate

Laravel's key:generate reads the .env file content; it must exist and be
parseable before the command runs.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docker/entrypoint.sh

@@ -7,15 +7,14 @@ mkdir -p storage/framework/{cache/data,sessions,views} storage/logs bootstrap/ca
 chown -R www-data:www-data storage bootstrap/cache
 chmod -R 775 storage bootstrap/cache
 
-# Create .env from environment variables if it doesn't exist
+# Create .env file — Laravel's key:generate needs it to exist
 if [ ! -f .env ]; then
-    echo "APP_KEY=" > .env
+    cp .env.example .env 2>/dev/null || echo "APP_KEY=" > .env
 fi
 
-# Generate APP_KEY if not set
-if [ -z "$APP_KEY" ] || [ "$APP_KEY" = "" ]; then
+# Generate APP_KEY if not set via environment
+if [ -z "$APP_KEY" ]; then
     php artisan key:generate --force --no-interaction
-    export APP_KEY=$(grep '^APP_KEY=' .env | cut -d= -f2-)
 fi
 
 php artisan config:cache