upd images

screenshot/README.md

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+# Requirements
+
+This script assumes that you have installed wkhtmltopdf.
+
+```bash
+sudo apt install wkhtmltopdf
+```
+
+# Usage
+
+```bash
+python mk_screenshot.py
+```
+
+# Authentification
+
+You have to allow `wkhtmltopdf` to authenticate. To do so, get a valid cookie key/value by copying as curl any request to a Chill page in your browser (Go to the network panel, pick a request and "copy as curl").
+
+Then, copy the 'PHPSESSID=57dee6deabd6e0ae75f7a55421fc2427' value (eg: 57dee6deabd6e0ae75f7a55421fc2427) in `COOKIE_VALUE` in the python script.
+
+# Post-processing
+
+Images are too heavy, so they can be resized.