chore: update .env.sample and README with mail server configuration

- Added SMTP_USER and FROM_ADDRESS to .env.sample for email configuration.
- Updated README to include mail server settings for better setup guidance.

Author: asepindrak

.env.sample

@@ -46,8 +46,8 @@ S3_ENDPOINT_URL=
 # Mail Server
 SMTP_HOST=host.docker.internal
 SMTP_PORT=587
-SMTP_USER=
+SMTP_USER=[email protected]
 SMTP_PASS=
 SMTP_SECURE=false    # true untuk SMTPS(465), false untuk STARTTLS (587)
 FROM_NAME=CommitFlow
-FROM_ADDRESS=
+FROM_ADDRESS=[email protected]

README.md

@@ -224,6 +224,15 @@ S3_ACCESS_KEY=
 S3_SECRET_KEY=
 # S3 COMPATIBLE STORAGE
 S3_ENDPOINT_URL=
+
+# Mail Server
+SMTP_HOST=host.docker.internal
+SMTP_PORT=587
+[email protected]
+SMTP_PASS=
+SMTP_SECURE=false    # true for SMTPS(465), false for STARTTLS (587)
+FROM_NAME=CommitFlow
+[email protected]
 ```
 
 > **Note:** Use `db` as the PostgreSQL host inside Docker (not `localhost`).