Added permissions to GitHub Actions jobs

.github/workflows/build-and-release.yml

@@ -14,6 +14,8 @@ jobs:
   read_metadata:
     name: Read metadata
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
     outputs:
       formatted_version: ${{ steps.format_metadata.outputs.formatted_version }}
       formatted_build_time: ${{ steps.format_metadata.outputs.formatted_build_time }}
@@ -80,6 +82,8 @@ jobs:
   build_main:
     name: Build app (${{ matrix.dotnet_runtime }})
     needs: read_metadata
+    permissions:
+      contents: read
     
     strategy:
       fail-fast: true
@@ -703,6 +707,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: [build_main, read_metadata]
     if: startsWith(github.ref, 'refs/tags/v')
+    permissions: {}
     steps:
       - name: Create artifact directory
         run: mkdir -p $GITHUB_WORKSPACE/artifacts