Images optimization plugin

Compress images with image-optimizer (https://github.com/spatie/image-optimizer). Those following dependencies must be installed on the server:

• sudo apt-get install jpegoptim
• sudo apt-get install optipng
• sudo apt-get install pngquant
• sudo npm install -g svgo
• sudo apt-get install gifsicle

After, you can do that in twig (format in jpg in case the client uploads png images for photos):

<img src="{{ asset.getUrl({mode: 'crop', width: 100, height: 100, format: 'jpg') }}" >