[Notifier] Streamline README files

src/Symfony/Component/Notifier/Bridge/Firebase/README.md

@@ -1,13 +1,12 @@
 Firebase Notifier
 =================
 
-Provides Firebase integration for Symfony Notifier.
+Provides [Firebase](https://firebase.google.com) integration for Symfony Notifier.
 
 DSN example
 -----------
 
 ```
-// .env file
 FIREBASE_DSN=firebase://USERNAME:PASSWORD@default
 ```
 

src/Symfony/Component/Notifier/Bridge/FreeMobile/README.md

@@ -1,7 +1,8 @@
 Free Mobile Notifier
 ====================
 
-Provides Free Mobile integration for Symfony Notifier.
+Provides [Free Mobile](https://mobile.free.fr) integration for Symfony Notifier.
+
 This provider allows you to receive an SMS notification
 on your personal mobile number.
 
@@ -9,7 +10,6 @@ DSN example
 -----------
 
 ```
-// .env file
 FREE_MOBILE_DSN=freemobile://LOGIN:PASSWORD@default?phone=PHONE
 ```
 

src/Symfony/Component/Notifier/Bridge/Mattermost/README.md

@@ -1,13 +1,12 @@
 Mattermost Notifier
 ===================
 
-Provides Mattermost integration for Symfony Notifier.
+Provides [Mattermost](https://mattermost.com) integration for Symfony Notifier.
 
 DSN example
 -----------
 
 ```
-// .env file
 MATTERMOST_DSN=mattermost://ACCESS_TOKEN@default?channel=CHANNEL
 ```
 

src/Symfony/Component/Notifier/Bridge/Nexmo/README.md

@@ -1,7 +1,19 @@
 Nexmo Notifier
 ==============
 
-Provides Nexmo integration for Symfony Notifier.
+Provides [Nexmo](https://nexmo.com) integration for Symfony Notifier.
+
+DSN example
+-----------
+
+```
+NEXMO_DSN=nexmo://KEY:SECRET@default?from=FROM
+```
+
+where:
+- `KEY` is your Nexmo key
+- `SECRET` is your Nexmo secret
+- `FROM` is your sender
 
 Resources
 ---------

src/Symfony/Component/Notifier/Bridge/OvhCloud/README.md

@@ -1,7 +1,20 @@
 OvhCloud Notifier
 =================
 
-Provides OvhCloud integration for Symfony Notifier.
+Provides [OvhCloud](https://docs.ovh.com/gb/en/sms/) integration for Symfony Notifier.
+
+DSN example
+-----------
+
+```
+OVHCLOUD_DSN=ovhcloud://APPLICATION_KEY:APPLICATION_SECRET@default?consumer_key=CONSUMER_KEY&service_name=SERVICE_NAME
+```
+
+where:
+- `APPLICATION_KEY` is your OvhCloud application key
+- `APPLICATION_SECRET` is your OvhCloud application secret
+- `CONSUMER_KEY` is your OvhCloud consumer key
+- `SERVICE_NAME` is your OvhCloud service name
 
 Resources
 ---------

src/Symfony/Component/Notifier/Bridge/RocketChat/README.md

@@ -1,13 +1,12 @@
 RocketChat Notifier
 ===================
 
-Provides RocketChat integration for Symfony Notifier.
+Provides [RocketChat](https://rocket.chat) integration for Symfony Notifier.
 
 DSN example
 -----------
 
 ```
-// .env file
 ROCKETCHAT_DSN=rocketchat://ACCESS_TOKEN@default?channel=CHANNEL
 ```
 

src/Symfony/Component/Notifier/Bridge/Sinch/README.md

@@ -1,13 +1,12 @@
 Sinch Notifier
 ==============
 
-Provides Sinch integration for Symfony Notifier.
+Provides [Sinch](https://www.sinch.com) integration for Symfony Notifier.
 
 DSN example
 -----------
 
 ```
-// .env file
 SINCH_DSN=sinch://SERVICE_PLAN_ID:AUTH_TOKEN@default?from=FROM
 ```
 

src/Symfony/Component/Notifier/Bridge/Slack/README.md

@@ -1,7 +1,22 @@
 Slack Notifier
 ==============
 
-Provides Slack integration for Symfony Notifier.
+Provides [Slack](https://slack.com) integration for Symfony Notifier.
+
+DSN example
+-----------
+
+```
+SLACK_DSN=slack://default/ID
+```
+
+where:
+- `ID` is your webhook id (e.g. `/XXXXXXXXX/XXXXXXXXX/XXXXXXXXXXXXXXXXXXXXXXXX`)
+
+in this case:
+```
+SLACK_DSN=slack://default/XXXXXXXXX/XXXXXXXXX/XXXXXXXXXXXXXXXXXXXXXXXX
+```
 
 Resources
 ---------

src/Symfony/Component/Notifier/Bridge/Telegram/README.md

@@ -1,7 +1,18 @@
 Telegram Notifier
 =================
 
-Provides Telegram integration for Symfony Notifier.
+Provides [Telegram](https://telegram.org) integration for Symfony Notifier.
+
+DSN example
+-----------
+
+```
+TELEGRAM_DSN=telegram://TOKEN@default?channel=CHAT_ID
+```
+
+where:
+- `TOKEN` is your Telegram token
+- `CHAT_ID` is your Telegram chat id
 
 Resources
 ---------

src/Symfony/Component/Notifier/Bridge/Twilio/README.md

@@ -1,7 +1,19 @@
 Twilio Notifier
 ===============
 
-Provides Twilio integration for Symfony Notifier.
+Provides [Twilio](https://www.twilio.com) integration for Symfony Notifier.
+
+DSN example
+-----------
+
+```
+TWILIO_DSN=twilio://SID:TOKEN@default?from=FROM
+```
+
+where:
+- `SID` is your Twillio ID
+- `TOKEN` is your Twilio token
+- `FROM` is your sender
 
 Resources
 ---------