[BUG] `update-ngxblocker -z` doesn't work without having `*.vhost` files

[drptbl]

Describe the bug

update-ngxblocker -z doesn't work without having *.vhost files. This forces to do manual installation as a workaround instead of using automated script inside docker containers.

To Reproduce

Steps to reproduce the behavior: Run this Dockerfile with docker build --progress=plain --no-cache .:

FROM nginx:1.23.3-alpine-slim
RUN apk add curl wget bind-tools
RUN mkdir -p /usr/local/sbin
RUN wget https://raw.githubusercontent.com/mitchellkrogza/nginx-ultimate-bad-bot-blocker/master/install-ngxblocker -O /usr/local/sbin/install-ngxblocker
RUN chmod +x /usr/local/sbin/install-ngxblocker
WORKDIR /usr/local/sbin
RUN install-ngxblocker -x
RUN chmod +x setup-ngxblocker
RUN chmod +x update-ngxblocker
RUN setup-ngxblocker -z

Expected behavior

update-ngxblocker -z should work without having *.vhost present.

Screenshots

Server (please complete the following information):

• Operating System: Alpine
• Nginx Version: 1.23.3
• Any other applicable log / error messages that may help us to help you.

  #13 [10/10] RUN setup-ngxblocker -z
  #13 sha256:3851720e4e1a1c3913b5fe1d1eeb288445e4093254c3bf0351c43bed1e80d368
  #13 0.315 find: /etc/nginx/sites-available: No such file or directory
  #13 0.315 using a file extension for vhost files allows multiple domains to be included with a single directive in nginx.conf:
  #13 0.315 
  #13 0.315 include /etc/nginx/sites-enabled/*.vhost;
  #13 0.315 
  #13 0.315 see command line switches below: -e to customise the vhost file extension
  #13 0.315 
  #13 0.315 no vhost files in: [ /etc/nginx/sites-available/*.vhost ] => exiting.

[itoffshore]

the clue is in the error message - the vhost extension can be customized with -e