docs: remove code snippets from main README (#631)

We want to delegate it to the docs site, as it will be up-to-date

README.md

@@ -6,85 +6,5 @@ _Testcontainers for Go_ is a Go package that makes it simple to create and clean
 automated integration/smoke tests. The clean, easy-to-use API enables developers to programmatically define containers
 that should be run as part of a test and clean up those resources when the test is done.
 
-Here's an example of a test that spins up an NGINX container validates that it returns 200 for the status code:
-
-```go
-package main
-
-import (
-	"context"
-	"fmt"
-	"net/http"
-	"testing"
-
-	"github.com/testcontainers/testcontainers-go"
-	"github.com/testcontainers/testcontainers-go/wait"
-)
-
-type nginxContainer struct {
-	testcontainers.Container
-	URI string
-}
-
-func setupNginx(ctx context.Context) (*nginxContainer, error) {
-	req := testcontainers.ContainerRequest{
-		Image:        "nginx",
-		ExposedPorts: []string{"80/tcp"},
-		WaitingFor:   wait.ForHTTP("/"),
-	}
-	container, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{
-		ContainerRequest: req,
-		Started:          true,
-	})
-	if err != nil {
-		return nil, err
-	}
-
-	ip, err := container.Host(ctx)
-	if err != nil {
-		return nil, err
-	}
-
-	mappedPort, err := container.MappedPort(ctx, "80")
-	if err != nil {
-		return nil, err
-	}
-
-	uri := fmt.Sprintf("http://%s:%s", ip, mappedPort.Port())
-
-	return &nginxContainer{Container: container, URI: uri}, nil
-}
-
-func TestIntegrationNginxLatestReturn(t *testing.T) {
-	if testing.Short() {
-		t.Skip("skipping integration test")
-	}
-
-	ctx := context.Background()
-
-	nginxC, err := setupNginx(ctx)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	// Clean up the container after the test is complete
-	defer func() {
-		if err := nginxC.Terminate(ctx); err != nil {
-			t.Fatalf("failed to terminate container: %v", err)
-		}
-	}()
-
-	resp, err := http.Get(nginxC.URI)
-	if resp.StatusCode != http.StatusOK {
-		t.Fatalf("Expected status code %d. Got %d.", http.StatusOK, resp.StatusCode)
-	}
-}
-```
-
-Cleaning up your environment after test completion should be accomplished by deferring the container termination, e.g
-`defer nginxC.Terminate(ctx)`. Reaper (Ryuk) is also enabled by default to help clean up.
-
-## Documentation
-
-More information about _Testcontainers for Go_ can be found in [./docs](./docs), which is rendered at
+You can find more information about _Testcontainers for Go_ in the [./docs](./docs) directory, which is rendered at
 [golang.testcontainers.org](https://golang.testcontainers.org).