Install locally and test the following queries on an indexing server, e.g. 'https://chronik-native1.fabien.cash'
- query for chronik.block(856498) with chronik-native1 as first server and no second server, no response, error
- query for chronik.block(856498) with chronik-native1 as first server and chronik-native2 as second server, get response as failoverProxy cycles to next server
- query for chronik.block('test') with chronik-native1 as first server and no second server, we get "error connecting to known chronik instances" as the indexing server does not return the proper error msg
- query chronik.block('test') with chronik-native1 as the first server and chronik-native2 as second server, get expected error "Error in printBlock Error: Failed getting /block/test (): 400: Not a hash or height: test" (confirming that we cycled to the good server with a bad query to a bad server).