autogenerate collection item IDs

docs/get-started-cli.md

@@ -13,7 +13,7 @@ export ACMS_CONTENT=$PWD/content
 ## Create a restaurant collection type
 
 ```console
-acms collection insert restaurant/1.json <<'EOF'
+acms collection add restaurant <<'EOF'
 {
   "name": "Biscotte Restaurant",
   "description": "Welcome to Biscotte restaurant! Restaurant Biscotte offers a cuisine based on fresh, quality products, often local, organic when possible, and always produced by passionate producers."
@@ -24,7 +24,7 @@ EOF
 ## Create a category collection type
 
 ```console
-acms collection insert category/1.json <<'EOF'
+acms collection add category <<'EOF'
 {
   "name": "French Food",
   "restaurant": "1.json"
@@ -33,7 +33,7 @@ EOF
 ```
 
 ```console
-acms collection insert category/2.json <<'EOF'
+acms collection add category <<'EOF'
 {
   "name": "Brunch",
   "restaurant": "1.json"