added a go mod file in src dir and added the base to some dagger ci stuff

ci/build_test.go

@@ -0,0 +1,42 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"os"
+
+	"dagger.io/dagger"
+)
+
+func main() {
+	ctx := context.Background()
+
+	// initialize Dagger client
+	client, err := dagger.Connect(ctx, dagger.WithLogOutput(os.Stderr))
+	if err != nil {
+		panic(err)
+	}
+	defer client.Close()
+
+	// use a node:16-slim container
+	// mount the source code directory on the host
+	// at /src in the container
+	source := client.Container().
+		From("golang:1.19").
+		WithDirectory("/src", client.Host().Directory(".", dagger.HostDirectoryOpts{
+			Exclude: []string{"ci/"},
+		}))
+
+		// set the working directory in the container
+		// install application dependencies
+	runner := source.WithWorkdir("/src").
+		WithExec([]string{"go", "mod", "tidy"})
+
+		// run application tests
+	out, err := runner.WithExec([]string{"go", "test"}).
+		Stderr(ctx)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println(out)
+}