updated dagger functions

dagger.md

@@ -20,17 +20,60 @@ dagger call -m github.com/jpadams/daggerverse/[email protected] scan-image --image-re
 ```
 
 
-## CREATE A PIPELINE
+## FUNCTIONS
 
-### INIT PIPELINE
+### CREATE A NEW FUNCTION
 
 ```bash
 dagger init --sdk=go --source=./dagger
 ```
 
-### CALL A FUNCTION
+### CREATE FUNCTION WITH RETURN
+
+the following function is using a golang base image and builds a binary
+
+```go
+												// dagger call build --progress plain --src ./ export --path build (returned dir(path))
+func (m *Clusterbook) Build(ctx context.Context, src *dagger.Directory) *dagger.Directory {
+
+	// get `golang` image
+	golang := dag.Container().From("golang:latest")
+
+	// mount cloned repository into `golang` image
+	golang = golang.WithDirectory("/src", src).WithWorkdir("/src")
+
+	// define the application build command
+	path := "build/"
+	golang = golang.WithExec([]string{"env", "GOOS=linux", "GOARCH=amd64", "go", "build", "-o", path, "./main.go"})
+}
+```
+
+### CALL FUNCTION
 
 ```bash
 dagger functions
-dagger call container-echo --string-arg world
+dagger call build --progress plain --src ./ export --path build
+```
+
+### CREATE FUNCTION WHICH IS BASED ON A IMPORT WITHOUT A RETURN
+
+```go
+func (m *Clusterbook) Scan(ctx context.Context, image string) {
+
+	golang := dag.Container().From(image)
+
+	scanResult, _ := dag.Trivy().ScanContainer(ctx, golang, dagger.TrivyScanContainerOpts{
+		TrivyImageTag: trivyImageTag,
+		Severity:      "HIGH,CRITICAL",
+		Format:        "table",
+		ExitCode:      0,
+	})
+
+	fmt.Println(scanResult)
+}
+```
+
+```
+dagger install github.com/jpadams/daggerverse/trivy
+dagger call scan --progress plain --image nginx:latest
 ```