fix(ci): remove DOCKER env and local browser install for Playwright workflow

DOCKER=true caused isInsideDocker to be true, making Creevey connect
to the container's bridge IP instead of localhost, resulting in
ECONNREFUSED. Removing it lets Creevey use Docker mode correctly on
bare CI host. Local browser install is unnecessary since Creevey
manages its own Docker container.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: Dmitriy

.github/workflows/creevey-playwright.yml

@@ -72,18 +72,6 @@ jobs:
         working-directory: ${{ matrix.fixture }}
         run: bun install
 
-      # Install Playwright browsers (Node)
-      - name: Install Playwright browsers (Node)
-        if: matrix.runtime == 'node'
-        working-directory: ${{ matrix.fixture }}
-        run: npx playwright install chromium
-
-      # Install Playwright browsers (Bun)
-      - name: Install Playwright browsers (Bun)
-        if: matrix.runtime == 'bun'
-        working-directory: ${{ matrix.fixture }}
-        run: bunx playwright install chromium
-
       # Build Storybook (Node)
       - name: Build Storybook (Node)
         if: matrix.runtime == 'node'
@@ -118,7 +106,6 @@ jobs:
         working-directory: ${{ matrix.fixture }}
         env:
           STORYBOOK_URL: http://localhost:6006
-          DOCKER: "true"
         run: npm run creevey -- test
 
       # Run Creevey tests (Bun)
@@ -127,7 +114,6 @@ jobs:
         working-directory: ${{ matrix.fixture }}
         env:
           STORYBOOK_URL: http://localhost:6006
-          DOCKER: "true"
         run: bun run creevey test
 
       - name: Upload test results