Debug node-red-contrib-ical-events

My library kalender-eventsopen in new window uses the debugopen in new window package to put out some more informations, when collecting ical events from the calender.

To activate the additional logging, you have to set the environment variable DEBUG to kalender-events.

To do so, you have serveral options: (The following should also work with the Raspberry Pi commands, described here: https://nodered.org/docs/getting-started/raspberrypi)

add the environment variable directly before the node-red command:
```
DEBUG=kalender-events* node-red
```
add the environment variable for the current session before executing the node-red command:
```
export DEBUG=kalender-events* 
node-red
```

add the environment variable at the top of the settings.js file of node-red and restart node-red:

process.env.DEBUG="kalender-events*"
module.exports = {
  // the tcp port that the Node-RED web server is listening on
  uiPort: process.env.PORT || 1880,

add the environment variable the docker envs and restart it:

################################################################################
# Node-RED Stack or Compose
################################################################################
# docker stack deploy node-red --compose-file docker-compose-node-red.yml
# docker-compose -f docker-compose-node-red.yml -p myNoderedProject up
################################################################################
version: "3.7"

services:
node-red:
    image: nodered/node-red:latest
    environment:
    - TZ=Europe/Amsterdam
    - DEBUG=kalender-events*
    ports:
    - "1880:1880"
    networks:
    - node-red-net
    volumes:
    - node-red-data:/data

volumes:
node-red-data:

networks:
node-red-net:

or:

docker run -it -p 1880:1880 --env DEBUG=kalender-events* -v node_red_data:/data --name mynodered nodered/node-red

# Debug node-red-contrib-ical-events

Debug node-red-contrib-ical-events