use external file for code snippets

Author: Blargian

docs/use-cases/observability/clickstack/ingesting-data/collector.md

@@ -162,7 +162,49 @@ The following configuration shows collection of this [unstructured log file](htt
 Note the use of operators to extract structure from the log lines (`regex_parser`) and filter events, along with a processor to batch events and limit memory usage.
 
 ```yaml file=code_snippets/ClickStack/config-unstructured-logs-with-processor.yaml
-place holder text
+receivers:
+  filelog:
+    include:
+      - /opt/data/logs/access-unstructured.log
+    start_at: beginning
+    operators:
+      - type: regex_parser
+        regex: '^(?P<ip>[\d.]+)\s+-\s+-\s+\[(?P<timestamp>[^\]]+)\]\s+"(?P<method>[A-Z]+)\s+(?P<url>[^\s]+)\s+HTTP/[^\s]+"\s+(?P<status>\d+)\s+(?P<size>\d+)\s+"(?P<referrer>[^"]*)"\s+"(?P<user_agent>[^"]*)"'
+        timestamp:
+          parse_from: attributes.timestamp
+          layout: '%d/%b/%Y:%H:%M:%S %z'
+          #22/Jan/2019:03:56:14 +0330
+processors:
+  batch:
+    timeout: 1s
+    send_batch_size: 100
+  memory_limiter:
+    check_interval: 1s
+    limit_mib: 2048
+    spike_limit_mib: 256
+exporters:
+  # HTTP setup
+  otlphttp/hdx:
+    endpoint: 'http://localhost:4318'
+    headers:
+      authorization: <YOUR_INGESTION_API_KEY>
+    compression: gzip
+
+  # gRPC setup (alternative)
+  otlp/hdx:
+    endpoint: 'localhost:4317'
+    headers:
+      authorization: <YOUR_API_INGESTION_KEY>
+    compression: gzip
+service:
+  telemetry:
+    metrics:
+      address: 0.0.0.0:9888 # Modified as 2 collectors running on same host
+  pipelines:
+    logs:
+      receivers: [filelog]
+      processors: [batch]
+      exporters: [otlphttp/hdx]
 ```
 
 Note the need to include an [authorization header containing your ingestion API key](#securing-the-collector) in any OTLP communication.