asterisk vendor: always append TURN port even when TURN_SERVER is host-only

entrypoint.sh's turn_server fallback only appended :TURN_PORT when TURN_SERVER
was completely unset — a TURN_SERVER carried over from an older install (or
set to a bare host by hand) passed straight through with no port, so the
Sipnetic QR export's "st=turn:user:pass@host" field ended up missing the
port entirely. Append it whenever the configured value has no colon at all,
not just when it's empty.

vendor/easy-asterisk/docker/entrypoint.sh

@@ -134,6 +134,15 @@ mkdir -p "$CONFIG_DIR"
 
 # Determine TURN/STUN server address
 turn_server="${TURN_SERVER:-${DOMAIN_NAME:-$local_ip}:${TURN_PORT:-3478}}"
+# TURN_SERVER may be set (e.g. carried over in .env from an older install)
+# to a bare host with no port — the fallback above only appends one when
+# TURN_SERVER is unset/empty entirely. Append it here too so every client
+# that reads this config (Sipnetic QR export, the web admin's own display)
+# always gets a host:port it can actually dial, not a host that silently
+# depends on the client guessing the default port.
+if [[ -n "$TURN_SERVER" && "$TURN_SERVER" != *:* ]]; then
+    turn_server="${TURN_SERVER}:${TURN_PORT:-3478}"
+fi
 
 cat > "$CONFIG_FILE" << EOF
 # Easy Asterisk Configuration (Docker) - $(date)