I noticed that since yesterday the API returns only 503 errors.

Here is the output of running the example provided by the README.md

```
➜ ~ warnings=$(curl -X 'POST' \
'https://megov.bayern.de/verbraucherschutz/baystmuv-verbraucherinfo/rest/api/warnings/merged' \
-H 'accept: application/json' \
-H 'Authorization: baystmuv-vi-1.0 os=ios, key=9d9e8972-ff15-4943-8fea-117b5a973c61' \
-H 'Content-Type: application/json' \
-d '{
"food": {
"rows": 500,
"sort": "publishedDate desc, title asc",
"start": 11,
"fq": [
"publishedDate > 1630067654000"
]
},
"products": {
"rows": 500,
"sort": "publishedDate desc, title asc",
"start": 11,
"fq": [
"publishedDate > 1630067654000"
]
}
}')
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 728 100 418 100 310 4488 3329 --:--:-- --:--:-- --:--:-- 7913
➜ ~ echo $warnings

503 Service Unavailable

Service Unavailable

The server is temporarily unable to service your
request due to maintenance downtime or capacity
problems. Please try again later.

Additionally, a 404 Not Found
error was encountered while trying to use an ErrorDocument to handle the request.

```