imp(testing-apps): remove dependency to webpack-encore.tgz, do it in …

…CI only + add some doc

.github/workflows/testing_apps.yml

@@ -11,13 +11,15 @@ jobs:
             working_directory: test_apps/npm
             script: |
               npm install --ci
+              npm add --save-dev ../../webpack-encore.tgz
               npm run encore dev
               npm run encore production
 
           - name: pnpm
             working_directory: test_apps/pnpm
             script: |
               pnpm install --frozen-lockfile
+              pnpm add --save-dev ../../webpack-encore.tgz
               pnpm run encore dev
               pnpm run encore production
 
@@ -26,6 +28,7 @@ jobs:
             script: |
               yarn set version berry
               yarn install --frozen-lockfile
+              yarn add --dev ../../webpack-encore.tgz
               yarn run encore dev
               yarn run encore production
 

.gitignore

@@ -1,6 +1,3 @@
 node_modules/
 npm-debug.log*
 /test_tmp
-
-# Generated through "yarn pack --filename webpack-encore.tgz", useful for testing "testing apps" locally.
-webpack-encore.tgz

test_apps/npm/README.md

@@ -0,0 +1,18 @@
+# Testing app: npm 
+
+This testing app is used to test how Encore installation and usage work when using the [**npm** package manager](https://docs.npmjs.com/cli/).
+
+## Installation
+
+```shell
+$ (cd ../..; yarn pack --filename webpack-encore.tgz)
+$ npm add --save-dev ../../webpack-encore.tgz
+$ npm install
+```
+
+## Usage
+
+```
+$ npm run encore dev
+$ npm run encore production
+```