[WeKan] Remove mail settings because it just does not work

With STARTTLS and all configuration possible (and followed https://github.com/wekan/wekan/wiki/Troubleshooting-Mail and other issues), we just get ERRORS like 'not logged in' or 'unable to verify the first certificate'.

pica-wekan/README.md

@@ -11,9 +11,7 @@ La configuration se fait essentiellement via le [docker-compose.yml](./docker-co
 
 ### Lancement
 
-Au premier lancement, copier le fichier `.secrets.example` en `.secrets` et remplacer le mot de passe par celui du LDAP (disponible dans le [pass](https://gitlab.utc.fr/picasoft/interne/pass)).
-
-Il suffit ensuite d'un `docker-compose up -d`.
+Il suffit d'un `docker-compose up -d`.
 
 ### Mise à jour
 

pica-wekan/docker-compose.yml

@@ -39,6 +39,8 @@ services:
       - ACCOUNTS_LOCKOUT_KNOWN_USERS_FAILURES_BEFORE=10
       - ACCOUNTS_LOCKOUT_KNOWN_USERS_PERIOD=60
       - ACCOUNTS_LOCKOUT_KNOWN_USERS_FAILURE_WINDOW=15
+      # Mail sender
+      - MAIL_FROM=Pikan <wekan@picasoft.net>
     env_file: ./secrets/wekan.secrets
     depends_on:
       - wekan-db

pica-wekan/secrets/wekan.secrets.example

-# NOTE: Special characters need to be url-encoded in MAIL_URL.
-# You can encode those characters for example at: https://www.urlencoder.org
-MAIL_URL=smtp://wekan:password@mail.picasoft.net:587/?ignoreTLS=true&tls={rejectUnauthorized:false}