fix: minor fixes

    * Correct delete response header for go example from 'Put' to 'Delete'
    * Correct Justfile reference to 'frontend/web' to 'web'
    * Add slices package to replace ftl package that is now internal
    * Correct json serialization of product pricing from 'priceUSD' to 'priceUsd'

go/http/http.go

@@ -102,7 +102,7 @@ type DeleteResponse struct{}
 //ftl:ingress http DELETE /http/users/{userId}
 func Delete(ctx context.Context, req builtin.HttpRequest[DeleteRequest]) (builtin.HttpResponse[DeleteResponse, ftl.Unit], error) {
 	return builtin.HttpResponse[DeleteResponse, ftl.Unit]{
-		Headers: map[string][]string{"Put": {"Header from FTL"}},
+		Headers: map[string][]string{"Delete": {"Header from FTL"}},
 		Body:    ftl.Some(DeleteResponse{}),
 	}, nil
 }

online-boutique/Justfile

@@ -4,4 +4,4 @@ dev:
 
 # Start the example web frontend for online-boutique
 web:
-  cd frontend/web && npm install && npm run dev
+  cd web && npm install && npm run dev

online-boutique/backend/services/checkout/checkout.go

@@ -5,6 +5,8 @@ import (
 	"context"
 	"fmt"
 
+	"github.com/TBD54566975/ftl/examples/online-boutique/slices"
+
 	"github.com/google/uuid"
 
 	"ftl/builtin"
@@ -14,7 +16,6 @@ import (
 	"ftl/productcatalog"
 	"ftl/shipping"
 
-	"github.com/TBD54566975/ftl/backend/common/slices"
 	"github.com/TBD54566975/ftl/examples/online-boutique/common/money"
 
 	"github.com/TBD54566975/ftl/go-runtime/ftl"

online-boutique/backend/services/productcatalog/productcatalog.go

@@ -25,7 +25,7 @@ type Product struct {
 	Name        string         `json:"name"`
 	Description string         `json:"description"`
 	Picture     string         `json:"picture"`
-	PriceUSD    currency.Money `json:"priceUSD"`
+	PriceUSD    currency.Money `json:"priceUsd"`
 
 	// Categories such as "clothing" or "kitchen" that can be used to look up
 	// other related products.

online-boutique/backend/slices/slices.go

@@ -0,0 +1,9 @@
+package slices
+
+func Map[T, U any](slice []T, fn func(T) U) []U {
+	result := make([]U, len(slice))
+	for i, v := range slice {
+		result[i] = fn(v)
+	}
+	return result
+}