Migrate to pnpm

.github/workflows/nightly.yml

@@ -19,10 +19,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v6
-    - name: Use Node.js 22
-      uses: actions/setup-node@v6
-      with:
-        node-version: 22
+    - name: Setup pnpm
+      uses: pnpm/action-setup@v6
     - name: Compute Filename
       id: file
       run: |
@@ -38,17 +36,17 @@ jobs:
         filename=third-stats_${next}-alpha.${d}.xpi
         echo "Built filename is ${filename}"
         echo "FILENAME=${filename}" >> $GITHUB_OUTPUT
-    - name: Build app using NPM
+    - name: Build app
       run: |
-        npm install
-        npm run build
+        pnpm install --frozen-lockfile
+        pnpm build
     - name: Create Thunderbird add-on (.xpi)
       shell: bash
       run: |
         cd dist/
         zip -q -r ../${{ steps.file.outputs.FILENAME }} ./
     - name: Upload add-on nightly build artifact
-      uses: actions/upload-artifact@v6
+      uses: actions/upload-artifact@v7
       with:
         name: third-stats-nightly
         path: ${{ steps.file.outputs.FILENAME }}

README.md

@@ -75,16 +75,16 @@ If you encounter any problem, please [issue a bug report](https://github.com/dev
 
 ### Become a ThirdStats developer
 
-Here is how you can set up a local development environment:
+Here is how you can set up a local development environment. This project uses [pnpm](https://pnpm.io/installation#using-npm) as package manager.
 
 1. [Clone](https://help.github.com/en/articles/cloning-a-repository) this project with Git
-2. Install dependencies by running `npm install` within the cloned directory `third-stats/`
-3. Start the development server with `npm run dev`
+2. Install dependencies by running `pnpm install` within the cloned directory `third-stats/`
+3. Start the development server with `pnpm dev`
 4. Open development site by going to <http://localhost:8080> in your browser
 
 Note that this tool uses [Thunderbirds WebExtension APIs](https://thunderbird-webextensions.readthedocs.io/en/latest/index.html). This means that some JavaScript objects won't be available in your browser as development environment. If you want to test your changes in Thunderbird, do the following:
 
-5. Save all your changes and run `npm run build` to create a production build in the `dist/` directory
+5. Save all your changes and run `pnpm build` to create a production build in the `dist/` directory
 6. Open Thunderbird, go to main menu > add-ons > gear menu > debug add-ons > This Thunderbird > Load temporary add-on
 7. Now choose the manifest file inside the `dist/` directory and your modified add-on will be loaded for the current Thunderbird session. You can check the web console by clicking the button *Inspect* in the add-on tile.