ci: add minimum GitHub token permissions for workflows

Signed-off-by: Ashish Kurmi <akurmi@stepsecurity.io>

.github/workflows/docker.yml

@@ -11,6 +11,9 @@ on:
   workflow_dispatch:
 
 # A workflow run is made up of one or more jobs that can run sequentially or in parallel
+permissions:
+  contents: read
+
 jobs:
   release:
     runs-on: ubuntu-latest

.github/workflows/test.yaml

@@ -14,8 +14,14 @@ defaults:
   run:
     shell: bash
 
+permissions:
+  contents: read
+
 jobs:
   test:
+    permissions:
+      checks: write  # for coverallsapp/github-action to create new checks
+      contents: read  # for actions/checkout to fetch code
     name: Lint and test
     strategy:
       fail-fast: false
@@ -194,6 +200,8 @@ jobs:
           parallel: true
 
   finish:
+    permissions:
+      checks: write  # for coverallsapp/github-action to create new checks
     needs: test
     runs-on: ubuntu-latest
     steps: