refactor image import and add Alpine docker image

- dynamic import of QR reader
- build docker also for arm64

.github/workflows/ci.yml

@@ -4,14 +4,14 @@ on:
   push:
   pull_request:
   schedule:
-    - cron: '47 3 * * *'
+    - cron: '37 3 * * *'
 
 jobs:
   build:
 
     strategy:
       matrix:
-        python-version: ["3.x", "3.11", "3.10", "3.9", "pypy-3.9", "3.8", "pypy-3.8", "3.7", "pypy-3.7"]
+        python-version: ["3.x", "3.11", "3.10", "3.9", "3.8", "3.7"]
         platform: [ubuntu-latest, macos-latest, windows-latest]
         exclude:
           - platform: windows-latest
@@ -25,6 +25,14 @@ jobs:
         uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
+      - name: Install zbar shared lib for QReader (Linux)
+        if: runner.os == 'Linux'
+        run: |
+          sudo apt-get install -y libzbar0
+      - name: Install zbar shared lib for QReader (macOS)
+        if: runner.os == 'macOS'
+        run: |
+          brew install zbar
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip