root: update start scripts and remove dev

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

.changeset/four-drinks-begin.md

@@ -0,0 +1,16 @@
+---
+'@backstage/create-app': patch
+---
+
+Updated the root `package.json` in the template to use the new `backstage-cli repo start` command.
+
+The `yarn dev` command is now redundant and has been removed from the template. We recommend existing projects to add these or similar scripts to help redirect users:
+
+```json
+{
+  "scripts": {
+    "dev": "echo \"Use 'yarn start' instead\"",
+    "start-backend": "echo \"Use 'yarn start backend' instead\""
+  }
+}
+```

lighthouserc.js

@@ -52,7 +52,7 @@ module.exports = {
         outputPath: './.lighthouseci/reports',
         preset: 'desktop',
       },
-      startServerCommand: 'yarn start:lighthouse',
+      startServerCommand: 'yarn start',
       startServerReadyPattern: 'webpack compiled successfully',
       startServerReadyTimeout: 600000,
       numberOfRuns: 1,

package.json

@@ -33,8 +33,8 @@
     "build:plugins-report": "node ./scripts/build-plugins-report",
     "clean": "backstage-cli repo clean",
     "create-plugin": "echo \"use 'yarn new' instead\"",
-    "dev": "yarn workspaces foreach -A --include example-backend --include example-app --parallel --jobs unlimited -v -i run start",
-    "dev:next": "yarn workspaces foreach -A --include example-backend --include example-app-next --parallel --jobs unlimited -v -i run start",
+    "dev": "echo \"use 'yarn start' instead\"",
+    "dev:next": "echo \"use 'yarn start:next' instead\"",
     "docker-build": "yarn tsc && yarn workspace example-backend build && yarn workspace example-backend build-image",
     "fix": "backstage-cli repo fix --publish",
     "postinstall": "husky || true",
@@ -50,12 +50,11 @@
     "release": "node scripts/prepare-release.js && changeset version && yarn prettier --write '{packages,plugins}/*/{package.json,CHANGELOG.md}' '.changeset/*.json' && yarn install --no-immutable",
     "snyk:test": "npx snyk test --yarn-workspaces --strict-out-of-sync=false",
     "snyk:test:package": "yarn snyk:test --include",
-    "start": "yarn workspace example-app start",
-    "start-backend": "yarn workspace example-backend start",
-    "start-backend:legacy": "yarn workspace example-backend-legacy start",
-    "start:lighthouse": "yarn workspaces foreach -A --include example-backend --include example-app --parallel --jobs unlimited -v -i run start",
+    "start": "backstage-cli repo start",
+    "start-backend": "echo \"Use 'yarn start example-backend' instead\"",
+    "start-backend:legacy": "echo \"Use 'yarn start example-backend-legacy' instead\"",
     "start:microsite": "cd microsite/ && yarn start",
-    "start:next": "yarn workspace example-app-next start",
+    "start:next": "yarn start example-app-next example-backend",
     "storybook": "yarn ./storybook run storybook",
     "techdocs-cli": "node scripts/techdocs-cli.js",
     "techdocs-cli:dev": "cross-env TECHDOCS_CLI_DEV_MODE=true node scripts/techdocs-cli.js",

packages/create-app/templates/default-app/package.json.hbs

@@ -6,9 +6,7 @@
     "node": "20 || 22"
   },
   "scripts": {
-    "dev": "yarn workspaces foreach -A --include backend --include app --parallel --jobs unlimited -v -i run start",
-    "start": "yarn workspace app start",
-    "start-backend": "yarn workspace backend start",
+    "start": "backstage-cli repo start",
     "build:backend": "yarn workspace backend build",
     "build:all": "backstage-cli repo build --all",
     "build-image": "yarn workspace backend build-image",