enhancement(sftp): Add spool volume and README

imageroot/systemd/user/sftp.service

@@ -16,6 +16,7 @@ ExecStart=/usr/bin/podman run --conmon-pidfile %t/sftp.pid \
 	--name=%N \
 	--volume=moh:/var/sftp/moh:z \
 	--volume=sounds:/var/sftp/sounds:z \
+	--volume=spool:/var/sftp/spool:z \
 	--volume=sftp_ssh_config:/etc/ssh:Z \
 	--env=ASTERISK_RECORDING_SFTP_PORT \
 	--env=AMPMGRUSER \

sftp/README.md

@@ -12,3 +12,25 @@ On NethVoice, systemd unit file is provided. To enable it automatically, launch
 - `AMPDBNAME` FreePBX MariaDB database name (default: asterisk)
 - `NETHVOICE_MARIADB_PORT` Port of MariaDB
 - `ASTERISK_RECORDING_SFTP_PORT` Port where sftp service will be reachable
+
+## Access volumes
+
+Shared volumes are:
+
+- `sounds` - All asterisk system sounds, recordings and announcements
+- `moh` - Hold music
+- `spool` - All Asterisk spool directories (with call recordings under `spool/monitor`)
+
+To access sftp server, connect using sftp on port `$ASTERISK_RECORDING_SFTP_PORT` using the user `asterisk` and the NethVoice admin password.
+By default sftp access is only enabled from the same machine, to access from the outside, you have to open the port on firewall:
+
+example: ASTERISK_RECORDING_SFTP_PORT=20033, nethvoice instace is 1
+```
+firewall-cmd --permanent --service=nethvoice1 --add-port=20033/tcp
+firewall-cmd --reload
+```
+
+sample scp command:
+```
+scp -r -P 20033 asterisk@HOST:spool/monitor ./
+```