Move Go website_docs into opentelemetry.io repo (#2872)

Co-authored-by: Severin Neumann <neumanns@cisco.com>
Co-authored-by: Phillip Carter <pcarter@fastmail.com>

.github/CODEOWNERS

@@ -22,7 +22,7 @@ content/en/docs/collector                @open-telemetry/docs-approvers @open-te
 content/en/docs/demo                     @open-telemetry/docs-approvers @open-telemetry/demo-approvers
 content/en/docs/instrumentation/cpp/     @open-telemetry/docs-approvers @open-telemetry/cpp-maintainers
 content/en/docs/instrumentation/erlang/  @open-telemetry/docs-approvers @open-telemetry/erlang-approvers
-# go is a content module
+content/en/docs/instrumentation/go/      @open-telemetry/docs-approvers @open-telemetry/go-instrumentation-approvers
 content/en/docs/instrumentation/java/    @open-telemetry/docs-approvers @open-telemetry/java-maintainers @open-telemetry/java-instrumentation-maintainers
 content/en/docs/instrumentation/js/      @open-telemetry/docs-approvers @open-telemetry/javascript-approvers
 content/en/docs/instrumentation/net/     @open-telemetry/docs-approvers @open-telemetry/dotnet-approvers @open-telemetry/dotnet-instrumentation-approvers

.gitmodules

@@ -2,9 +2,6 @@
 	path = themes/docsy
 	url = https://github.com/cncf/docsy.git
 	branch = opentelemetry.io
-[submodule "content-modules/opentelemetry-go"]
-	path = content-modules/opentelemetry-go
-	url = https://github.com/open-telemetry/opentelemetry-go
 [submodule "content-modules/opentelemetry-specification"]
 	path = content-modules/opentelemetry-specification
 	url = https://github.com/open-telemetry/opentelemetry-specification.git

.prettierignore

@@ -18,12 +18,6 @@
 !/content-modules/community/mission-vision-values.md
 !/content-modules/community/roadmap.md
 
-!/content-modules/opentelemetry-go
-/content-modules/opentelemetry-go/*
-!/content-modules/opentelemetry-go/website_docs
-/content-modules/opentelemetry-go/website_docs/**/*
-!/content-modules/opentelemetry-go/website_docs/**/*.md
-
 # Ignore generated resources
 
 package-lock.json

content/en/docs/instrumentation/go/_index.md

@@ -0,0 +1,14 @@
+---
+title: Go
+description: >-
+  <img width="35" class="img-initial" src="/img/logos/32x32/Golang_SDK.svg"
+  alt="Go"></img> A language-specific implementation of OpenTelemetry in Go.
+aliases: [/golang, /golang/metrics, /golang/tracing]
+weight: 16
+---
+
+{{% docs/instrumentation/index-intro go /%}}
+
+## More
+
+- [Contrib repository](https://github.com/open-telemetry/opentelemetry-go-contrib)

content/en/docs/instrumentation/go/api.md

@@ -0,0 +1,8 @@
+---
+title: API reference
+linkTitle: API
+redirect: https://pkg.go.dev/go.opentelemetry.io/otel
+manualLinkTarget: _blank
+_build: { render: link }
+weight: 210
+---

content/en/docs/instrumentation/go/examples.md

@@ -0,0 +1,7 @@
+---
+title: Examples
+redirect: https://github.com/open-telemetry/opentelemetry-go/tree/main/example
+manualLinkTarget: _blank
+_build: { render: link }
+weight: 220
+---

content/en/docs/instrumentation/go/exporters.md

@@ -0,0 +1,57 @@
+---
+title: Exporters
+aliases: [/docs/instrumentation/go/exporting_data]
+weight: 50
+---
+
+In order to visualize and analyze your [traces](/docs/concepts/signals/traces/)
+and metrics, you will need to export them to a backend.
+
+## OTLP endpoint
+
+To send trace data to an OTLP endpoint (like the [collector](/docs/collector) or
+Jaeger >= v1.35.0) you'll want to configure an OTLP exporter that sends to your
+endpoint.
+
+### Using HTTP
+
+```go
+import (
+  	"go.opentelemetry.io/otel/exporters/otlp/otlptrace"
+  	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp"
+)
+
+func installExportPipeline(ctx context.Context) (func(context.Context) error, error) {
+	client := otlptracehttp.NewClient()
+	exporter, err := otlptrace.New(ctx, client)
+	if err != nil {
+		return nil, fmt.Errorf("creating OTLP trace exporter: %w", err)
+	}
+  	/* … */
+}
+```
+
+To learn more on how to use the OTLP HTTP exporter, try out the
+[otel-collector](https://github.com/open-telemetry/opentelemetry-go/tree/main/example/otel-collector)
+
+### Jaeger
+
+To try out the OTLP exporter, since v1.35.0 you can run
+[Jaeger](https://www.jaegertracing.io/) as an OTLP endpoint and for trace
+visualization in a docker container:
+
+```shell
+docker run -d --name jaeger \
+  -e COLLECTOR_OTLP_ENABLED=true \
+  -p 16686:16686 \
+  -p 4318:4318 \
+  jaegertracing/all-in-one:latest
+```
+
+## Prometheus
+
+Prometheus export is available in the
+`go.opentelemetry.io/otel/exporters/prometheus` package.
+
+Please find more documentation on
+[GitHub](https://github.com/open-telemetry/opentelemetry-go/tree/main/exporters/prometheus)