The steps taken to commit the changes to services.json were overly complicated.
This simplifies the steps to just `exit 0` if there are no changes to commit.
* Create nightly update workflow for instances
A nightly GitHub Actions CI workflow has been added to fetch new
instances of supported services within Farside.
Currently only Searx is supported, but obviously others could be added
if there are similarly easy ways to fetch and filter instances
programmatically.
services.json has also been updated with the initial results of the
workflow script.
* Set headers for every HTTPoison request
This serves as a workaround for bot blocking via filtron.
* Expand filtering of searx instances
New filter enforces:
- No Cloudflare
- Good TLS config
- Good HTTP header config
- Vanilla instances or forks
- Instances with 100% search success
