Add a release build workflow

.github/workflows/main.yml

@@ -24,35 +24,7 @@ jobs:
       with:
         submodules: 'recursive'
 
-    - name: Setup Python
-      uses: actions/setup-python@v2
-      with:
-        python-version: 3.x
-
-    - name: Cache python libs
-      uses: actions/cache@v1
-      id: cache-pip # needed in if test
-      with:
-        path: ~/.cache/pip
-        key: ${{ runner.os }}-pip
-
-    - name: Upgrade python tools
-      # We actually want to run this every time
-      # if: steps.cache-pip.outputs.cache-hit != 'true'
-      run: |
-        python -m pip install --upgrade pip
-        pip install -U platformio meshtastic adafruit-nrfutil
-
-    - name: Cache platformio
-      uses: actions/cache@v1
-      id: cache-platformio # needed in if test
-      with:
-        path: ~/.platformio
-        key: ${{ runner.os }}-platformio
-
-    - name: Upgrade platformio
-      run: |
-        pio upgrade
+    - uses: ./.github/actions/initbuild
 
     # We now run integration test before other build steps (to quickly see runtime failures)
     - name: Build for native
@@ -79,4 +51,4 @@ jobs:
       with:
         name: built
         path: release/archive/firmware-*.zip
-        rentention-days: 30
+        retention-days: 30