update release workflow

.github/workflows/release.yml

@@ -5,23 +5,22 @@ on:
   pull_request:
     types:
       - closed
+    branches:
+      - main
 
 jobs:
   build:
-    runs-on: ubuntu-20.04
-    strategy:
-      matrix:
-        python-version: ["3.10"]
+    runs-on: ubuntu-latest  # this is just the host, but the job will run in the container
+    container: ubuntu:20.04
     steps:
     - name: Check out code into the directory
       uses: actions/checkout@v3
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v3
-      with:
-        python-version: ${{ matrix.python-version }}
     - name: Install dependencies
       run: |
-        python -m pip install --upgrade pip
+        # Install required dependencies inside the container
+        apt-get update
+        apt-get install -y python3 python3-pip python3-dev wget build-essential
+        python3 -m pip install --upgrade pip
         pip install -r requirements.txt
     - name: Use pyinstall to create distribution binary
       run: mkdir /opt/netfoundry; pyinstaller -F support_bundle_bootstrap.py --runtime-tmpdir /opt/netfoundry/