TF-4136 Add document to configuration for Sentry

docs/configuration/sentry_configuration.md

@@ -0,0 +1,29 @@
+# Configuration for Sentry
+
+## Context
+- **Twake Mail** uses **Sentry** to collect and track application errors and performance issues.
+- Developers need to configure environment variables for **Sentry** service to enable monitoring and debugging.
+
+## How to configure
+
+### 1. Add environment variables for Sentry service
+Edit the file [`env.file`](https://github.com/linagora/tmail-flutter/blob/master/env.file) with the following content:
+
+```bash
+SENTRY_DSN=<your_sentry_dsn>
+SENTRY_ENVIRONMENT=<environment_name>
+```
+
+**Descriptions:**
+- `SENTRY_DSN`: The unique DSN (Data Source Name) provided by Sentry, used to identify and connect your project.
+- `SENTRY_ENVIRONMENT`: The environment name (e.g., `dev`, `staging`, `production`) to help Sentry categorize issues by deployment.
+
+### 2. Activate Sentry in environment file
+In [`env.file`](https://github.com/linagora/tmail-flutter/blob/master/env.file), ensure the following line is present:
+
+```bash
+SENTRY_ENABLED=true | false
+```
+
+### 3. Verification
+Run the app and trigger a sample error to verify that it appears in your Sentry dashboard.