playwright: cleanup build process

.github/workflows/playwright.yml

@@ -33,7 +33,7 @@ jobs:
         with:
           python-version: "3.x"
 
-      - name: Build
+      - name: Build Browser
         shell: bash
         run: |
           yarn --skip-integrity-check --network-timeout 100000
@@ -42,6 +42,11 @@ jobs:
           NODE_OPTIONS: --max_old_space_size=4096
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} # https://github.com/microsoft/vscode-ripgrep/issues/9
 
+      - name: Build Playwright
+        shell: bash
+        run: |
+          yarn --cwd examples/playwright build
+
       - name: Test (playwright)
         uses: GabrielBB/xvfb-action@v1
         with:

examples/playwright/docs/DEVELOPING.md

@@ -3,6 +3,7 @@
 ## Building
 
 Run `yarn` in the root directory of the repository.
+In order to build Playwright and install dependencies (ex: chromium) run `yarn --cwd examples/playwright` at the root of the repository.
 
 ## Executing the tests
 

examples/playwright/package.json

@@ -12,7 +12,6 @@
   },
   "homepage": "https://github.com/eclipse-theia/theia",
   "scripts": {
-    "prepare": "yarn clean && yarn build",
     "clean": "rimraf lib *.tsbuildinfo",
     "build": "tsc --incremental && npx playwright install chromium",
     "theia:start": "rimraf .tmp.cfg && THEIA_CONFIG_DIR=$PWD/.tmp.cfg yarn --cwd ../browser start",