[BUG] AIP cannot execute if `do_not_block_these_ips.csv` file does not exist, but file can be empty

[verovaleros]

Describe the bug

If this file can be empty, it seems unnecessary that the existence of the file should be a strict requirement:

AIP/lib/aip/models/base.py

Line 41 in 6e72fae

self.donotblocklist = pd.read_csv(path.join(data_dir, 'external', 'do_not_block_these_ips.csv'))

To Reproduce
Run AIP without this file:

docker run --rm -v /opt/zeek/logs/:/home/aip/AIP/data/raw:ro -v ${PWD}/data/:/home/aip/AIP/data/:rw --name aip stratosphereips/aip:latest bin/aip

Expected behaviour
If the file doesn't exist, then maybe it is possible to consider it empty. It would technically mean the same.

Screenshots