Refactors Playwright Dockerfile

Updates the Playwright Dockerfile to streamline the build process.

This change improves the Dockerfile by:

- Using `npm ci` for faster and more reliable dependency installation
- Copying the .npmrc file before copying the code.
- Installing Playwright browsers within the playwright-tests directory.

Dockerfile.playwright

@@ -5,14 +5,16 @@ FROM mcr.microsoft.com/playwright:v1.48.0-noble
 # Set the working directory in the container
 WORKDIR /app
 
-# Copy package.json and package-lock.json
-COPY package*.json ./
+ARG NPM_CONFIG_USERCONFIG=/tmp/.npmrc
+
+COPY playwright-tests/.npmrc /tmp/.npmrc
+
+# Copy the application code
+COPY . .
 
 # Install dependencies
-RUN npm install
+RUN npm ci
+RUN npm --prefix playwright-tests ci
 
 # Install Playwright browsers
-RUN npx playwright install chromium --with-deps
-
-# Copy the rest of the application code
-COPY . .
+RUN npx --prefix playwright-tests playwright install chromium --with-deps