Merge tag 'v0.2.0' into develop

Front:
 - Added GDPR notice
 - Make the extract configurator retractable
 - Check the user route before accessing it (better redirect system)

API:
 - Fix error handler (Some errors were ignored)
 - Added API route `/dataCollect`
   - Route code
   - Route tests
   - Route documentation

App:
 - Reworked uuid system to allow JSON body-parser (impossible to pass query parameter when using body-parser)
 - Added configuration system
   - Configuration for each part of the app: mixins, experiments and global
   - Configuration merger with inheritance-like system:
     - A default configuration in each part
     - Specific configuration for each scenes
     - Priority: `Global > Experiment > Mixin`
   - Updated [back.Dockerfile](./back.Dockerfile)
   - Updated [README.md](./README.md)

package.json

@@ -1,6 +1,6 @@
 {
   "name": "expe-web",
-  "version": "0.1.10",
+  "version": "0.2.0",
   "private": true,
   "scripts": {
     "server:start": "node -r esm server/index.js",