Add read permissions to GitHub workflows

The reuse and docker-publish workflow scripts in GitHub Actions have been updated. Now these scripts have permission to read contents. This will ensure secure access and controlled operations on repositories.

.github/workflows/docker-publish.yml

@@ -19,6 +19,9 @@ on:
   pull_request:
     branches: [ main ]
 
+permissions:
+  contents: read
+
 env:
   # Use docker.io for Docker Hub if empty
   REGISTRY: ghcr.io

.github/workflows/reuse.yml

@@ -3,6 +3,8 @@
 # SPDX-License-Identifier: CC0-1.0
 
 name: REUSE Compliance Check
+permissions:
+  contents: read
 
 on: [push, pull_request]