chore: modernize GitHub Actions workflows (#1)

Author: ohmyfelix

.github/workflows/docker.yml

@@ -4,6 +4,9 @@ on:
   push:
     branches: ["master"]
 
+permissions:
+  contents: read
+
 jobs:
   docker:
     runs-on: ubuntu-latest
@@ -19,22 +22,22 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Login to DockerHub
-        uses: docker/login-action@v1
+        uses: docker/login-action@v3
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
       - name: Set up QEMU
-        uses: docker/setup-qemu-action@v1
+        uses: docker/setup-qemu-action@v3
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v1
+        uses: docker/setup-buildx-action@v3
 
       - name: Cache Docker layers
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: /tmp/.buildx-cache
           key: ${{ runner.os }}-buildx-${{ github.sha }}-${{ matrix.image }}
@@ -43,7 +46,7 @@ jobs:
 
       - name: Build and push
         if: github.ref == 'refs/heads/master'
-        uses: docker/build-push-action@v2
+        uses: docker/build-push-action@v6
         with:
           context: ${{ matrix.image  }}
           push: true