[BUG] fluent-bit docker can't connect to data-prepper http 404

Describe the bug
VM1 192.168.12.12:2021: Docker:
data-prepper running

VM2: Fluent-bit docker:
/fluent-bit/bin/fluent-bit -i cpu -t cpu -o http -p Host=192.168.12.12 -p Port=2021 -m * -p URI /data-prepper/log/ingest -p Format json

4. See error
   in fluent-bit log:
   [2022/10/17 09:52:13] [ warn] [engine] failed to flush chunk '1-1666000332.243777239.flb', retry in 9 seconds: task_id=5, input=cpu.0 > output=http.0 (out_id=0)

[2022/10/17 09:52:14] [error] [output:http:http.0] 192.168.12.12:2021, HTTP status=404

Status: 404

Description: Not Found

And,
What is the URI in this example?
https://github.com/opensearch-project/data-prepper/blob/main/docs/log_analytics.md

URI /log/ingest
Format json

Data-prepper works with 'Host = localhost' , not working from remote.
Telnet able to connect to ip:2021

Start with the Fluent Bit command in the issue and compare its URI with the linked docs/log_analytics.md example. Investigate why the remote request to port 2021 returns HTTP 404 while localhost works. Done means the documented or corrected URI allows the remote Fluent Bit request to be accepted without a 404.