Created INGESTION.md

Signed-off-by: Dan Dong <58446449+danieldong51@users.noreply.github.com>

server/adaptors/integrations/__data__/repository/apache/info/INGESTION.md

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+# Ingestion Pipeline
+To set up an ingestion pipeline, I used Docker to run Fluent-bit and an Apache fake log generator, along with an instance of OpenSearch. 
+
+In `fluent-bit.conf`:
+- The input is wherever your Apache logs are being ingested from. In my case, since I was using an Apache log generator, I used the `forward` protocol.
+- Use the [filter from fluent-bit](https://github.com/fluent/fluent-bit/blob/master/conf/parsers.conf) for apache access logs.
+- Optionally, I used a [GeoIP2 Filter](https://docs.fluentbit.io/manual/pipeline/filters/geoip2-filter) to enrich the data with geolocation data.
+- Finally, I used a `otel-converter.lua` script to convert the parsed data into schema-compliant data
+- I outputted the data to the port my OpenSearch instance was listening on.