* allow custom http server base url by passing argument `getpot_bgutil_baseurl` (defaults to `http://127.0.0.1:4416`)
* Code formatting(use single quotes): be consistent, remove trailing whitespaces
* Use `yt_dlp.utils.Popen` instead of `subprocess.Popen`
* Add cause to several `RequestError`'s
* Do not use bare `except`
[server] add options to main.ts, misc
* generate_once.ts: Remove repeated logging
* main.ts: allow custom http server port by passing `-p, --port <PORT>` (defaults to 4416)
* main.ts: allow verbose logging for `SessionManager` by passing argument `--verbose`
* main.ts: return a JSON object when it fails to generate a visitordata

Co-authored-by: N/Ame <[email protected]>

Co-authored-by: N/Ame <[email protected]>

* code formatting
* be consistent(`encode()`, `decode()`): remove redundant arg `'utf-8'`
* be consistent: deal with invalid parameter (i.e. `base_url is None`) inside the function
* use `json.load` to read response
* no longer passes `cause` to the `RequestError` constructor as it is useless when a message is present, move the cause to the message
* logging: improve clarity