Create a release workflow for PyPI (#4)

* Create a release workflow

.github/workflows/integration_test.yaml

@@ -11,7 +11,7 @@ jobs:
       charmcraft-repository: weiiwang01/charmcraft
       charmcraft-ref: update-12f
       modules: '["test_charm", "test_proxy", "test_cos", "test_database", "test_db_migration", "test_django"]'
-      rockcraft-repository: weiiwang01/rockcraft
-      rockcraft-ref: add-django-framework
+      rockcraft-repository: canonical/rockcraft
+      rockcraft-ref: feature/12f
       juju-channel: 3.1/stable
       channel: 1.29-strict/stable

.github/workflows/release.yaml

@@ -0,0 +1,49 @@
+name: Release Python Package
+
+on:
+  workflow_dispatch:
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: "3.x"
+
+      - name: Install dependencies
+        run: python3 -m pip install --upgrade build
+
+      - name: Build package
+        run: python3 -m build
+
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: dist
+          path: dist/
+
+  release:
+    runs-on: ubuntu-latest
+    environment:
+      name: release
+      url: https://pypi.org/p/paas-app-charmer
+    permissions:
+      id-token: write
+    if: github.event_name == 'workflow_dispatch'
+    needs: [ build ]
+    steps:
+      - name: Download artifacts
+        uses: actions/download-artifact@v3
+        with:
+          name: dist
+          path: dist/
+
+      - name: Publish package to PyPI
+        uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          verbose: true