chore: modernize GitHub Actions workflows (#2)

Author: ohmyfelix

.github/workflows/docker.yml

@@ -4,6 +4,9 @@ on:
   push:
     branches: [master]
 
+permissions:
+  contents: read
+
 jobs:
   docker:
     runs-on: ubuntu-latest
@@ -21,22 +24,22 @@ 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: Build and push
-        uses: docker/build-push-action@v2
+        uses: docker/build-push-action@v6
         with:
           file: ${{ matrix.dockerfile }}
           push: true