Improve birdnet.conf source

birdnet-pi/rootfs/helpers/caddy_ingress.sh

@@ -2,7 +2,9 @@
 # shellcheck shell=bash
 
 # Get values
+set -u
 source /etc/birdnet/birdnet.conf
+set +u
 
 # Create ingress configuration for Caddyfile
   cat << EOF >> /etc/caddy/Caddyfile

birdnet-pi/rootfs/helpers/spectral_analysis.sh

@@ -1,6 +1,8 @@
 #!/usr/bin/env bash
 # Performs the recording from the specified RTSP stream or soundcard
+set -u
 source /etc/birdnet/birdnet.conf
+set +u
 
 # Read the logging level from the configuration option
 LOGGING_LEVEL="${LogLevel_BirdnetRecordingService}"