update docker entrypoint script

docker/run.sh

@@ -3,18 +3,11 @@
 # Print version to logs for debugging purposes
 /app/fail2ban-prometheus-exporter -version
 
-db_path=/app/fail2ban.sqlite3
 socket_path=/var/run/fail2ban/fail2ban.sock
 textfile_dir=/app/textfile/
 textfile_enabled=false
 
-# Blank out the file paths if they do not exist - a hacky way to only use these files if they were mounted into the container.
-if [ ! -f "$db_path" ]; then
-    db_path=""
-fi
-if [ ! -S "$socket_path" ]; then
-    socket_path=""
-fi
+# Enable textfile metrics if the folder exists (i.e. was mounted by docker)
 if [ -d $textfile_dir ]; then
     textfile_enabled=true
 fi
@@ -22,7 +15,6 @@ fi
 # Start the exporter (use exec to support graceful shutdown)
 # Inspired by: https://akomljen.com/stopping-docker-containers-gracefully/
 exec /app/fail2ban-prometheus-exporter \
-    -db "$db_path" \
     -socket "$socket_path" \
     -collector.textfile=$textfile_enabled \
     -collector.textfile.directory="$textfile_dir"