Reading from query bbox and reversing the order would not work anyway if not followed by reversing data (which is not cheap and would not do on default. It is visible on the sample data tests/data/coads_sst.nc where the start-stop swapping turn the data upside down.

there is no sense in reading it from source file once again

1. time axis shall be 't' in covjson, for backward compliance it can be set with 'time_axis_covjson' provider variable. if time_axis_covjson is not set the value is read from time_field which has default value read from the source file.
2. time axis is now list of values according to specification and it is now properly rendered on the html view of the query
3. typo in query.html to fix error with first layer being not generated

1.integrated changes from axis fix
2. dataType is float according to schema https://schemas.opengis.net/covjson/1.0/coveragejson.json (number is not valid, float, integer, string are)
3. parameter description as object according to schema https://schemas.opengis.net/covjson/1.0/coveragejson.json

coards_sst.nc data was shifted around 180 deg