fix this thing, but db error on startup

docker/Dockerfile

@@ -25,7 +25,7 @@ RUN DEBIAN_FRONTEND=noninteractive TZ=Europe/Lisbon apt install php8.2 php8.2-si
 ENV DB_CONNECTION=mysql 
 ENV DB_HOST=laraveldb 
 ENV DB_DATABASE=laravel
-ENV DB_USERNAME=root
+ENV DB_USERNAME=myuser
 ENV DB_PASSWORD=password
 
 RUN composer install
@@ -35,7 +35,10 @@ RUN php artisan key:generate
 # seed data if build arg is provided
 RUN if [ "$SEED_DATA" = true ]; then php artisan migrate --seed; fi
 
+EXPOSE 8000
+
 RUN npm install
 RUN npm run build
 
-EXPOSE 8000
+#Open on port 8000 to all addresses
+ENTRYPOINT php artisan serve --port=8000 --host=0.0.0.0