Improve OSSF score

.github/workflows/ci.yaml

@@ -6,6 +6,9 @@ on:
     branches:
       - main
 
+permissions:
+  contents: read
+
 jobs:
   build:
     runs-on: ubuntu-latest

.github/workflows/golangci-lint.yaml

@@ -2,8 +2,14 @@ name: golangci-lint
 
 on: [push, pull_request]
 
+permissions:
+  contents: read
+
 jobs:
   golangci:
+    permissions:
+      contents: read  # for actions/checkout to fetch code
+      pull-requests: read  # for golangci/golangci-lint-action to fetch pull requests
     name: lint
     runs-on: ubuntu-latest
     steps:

.github/workflows/stale.yaml

@@ -3,8 +3,14 @@ on:
   schedule:
     - cron: '0 */4 * * *'
 
+permissions:
+  contents: read
+
 jobs:
   prune_stale:
+    permissions:
+      issues: write  # for actions/stale to close stale issues
+      pull-requests: write  # for actions/stale to close stale PRs
     name: Prune Stale
     runs-on: ubuntu-latest
 

Dockerfile.ci

@@ -1,3 +1,3 @@
-FROM golang:1.21
+FROM golang:1.21@sha256:672a2286da3ee7a854c3e0a56e0838918d0dbb1c18652992930293312de898a6
 
 COPY --from=envoyproxy/envoy-dev:latest /usr/local/bin/envoy /usr/local/bin/envoy

examples/dyplomat/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.21
+FROM golang:1.21@sha256:672a2286da3ee7a854c3e0a56e0838918d0dbb1c18652992930293312de898a6
 
 WORKDIR /go/src/dyplomat
 COPY . /go/src/dyplomat