Add Log statement about statsd receiver (#2250)

* Set statsd by default and Add Log statement

* Modify doc

* Change to v0.33.0

* Rebase and correct the log

README.md

@@ -18,6 +18,10 @@ Use the community resources below for getting help with the ADOT Collector.
 * If you think you may have found a bug, open a [bug report](https://github.com/aws-observability/aws-otel-collector/issues/new?template=bug_report.md).
 * For contributing guidelines, refer to [CONTRIBUTING.md](CONTRIBUTING.md).
 
+### Notice: ADOT Collector v0.33.0 Breaking Change
+Users of the `statsd` receiver, please refer to GitHub Issue - [Warning: StatsD Receiver → EMF Exporter Metric Pipeline Breaking Change](https://github.com/aws-observability/aws-otel-collector/issues/2249)
+for information on an upcoming breaking change.
+
 #### ADOT Collector Built-in Components
 
 This table represents the supported components of the ADOT Collector. The highlighted components below are developed by AWS in-house. The rest of the components in the table are the essential default components that the ADOT Collector will support.

cmd/awscollector/main.go

@@ -93,6 +93,10 @@ func main() {
 func buildAndParseFlagSet(featgate *featuregate.Registry) (*flag.FlagSet, error) {
 	flagSet := config.Flags(featgate)
 
+	// TODO: remove after ADOT Collector v0.34.0 is released
+	log.Printf("attn: users of the statsd receiver please refer to " +
+		"https://github.com/aws-observability/aws-otel-collector/issues/2249 in regards to an ADOT Collector v0.33.0 " +
+		"breaking change")
 	if err := flagSet.Parse(os.Args[1:]); err != nil {
 		return nil, err
 	}

docs/developers/build-docker.md

@@ -7,4 +7,4 @@ aws-otel-collector is an open source project, we’re looking for the contributi
 2. Build your own docker image.  
 ```make docker-build ```
 3. Run AWSOTelCollector docker image with the default configuration file. By default, it will pull the latest image from ECR. Modify docker-compose.yaml to use your own image.  
-```cd examples; docker-compose up -d```
+```cd examples/docker; docker-compose up -d```