Migrate container publishing to Gitea Actions

.dockerignore

@@ -0,0 +1,6 @@
+.git
+.github
+.gitea
+.remember
+.env
+.DS_Store

.gitea/workflows/build-push.yml

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+name: Build and Push Docker Image
+
+on:
+  push:
+    branches: [main]
+  schedule:
+    - cron: '0 0 3 * *' # Monthly on the third day, at midnight UTC.
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: kube
+    if: github.ref == 'refs/heads/main'
+    env:
+      DOCKER_BUILD_RECORD_UPLOAD: 'false'
+      DOCKER_BUILD_SUMMARY: 'false'
+    steps:
+      - name: Checkout code
+        uses: https://github.com/actions/checkout@v4
+        with:
+          persist-credentials: false
+
+      - name: Install Docker CLI
+        run: |
+          apt-get update
+          apt-get install -y --no-install-recommends docker.io
+          rm -rf /var/lib/apt/lists/*
+
+      - name: Log in to Docker Hub
+        uses: https://github.com/docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_TOKEN }}
+
+      - name: Set up temporary builder
+        uses: https://github.com/docker/setup-buildx-action@v3
+        with:
+          driver: docker-container
+          cache-binary: false
+          keep-state: false
+          cleanup: true
+
+      - name: Build and push to Docker Hub
+        uses: https://github.com/docker/build-push-action@v6
+        with:
+          context: .
+          platforms: linux/amd64
+          pull: true
+          push: true
+          load: false
+          tags: docker.io/k2patel/rtorrent:latest
+          labels: |
+            org.opencontainers.image.source=https://git.k2patel.in/k2patel/docker-rtorrent
+            org.opencontainers.image.revision=${{ github.sha }}

.github/workflows/build-push.yml

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-name: Build and Push Docker Image
-
-
-# This workflow is manually triggered from the "Actions" tab in GitHub.
-# It requires a single input: the version tag of the flood repository to use.
-on:
-  schedule:
-    - cron: '0 0 3 * *'  # This runs at midnight on the first day of every month
-  workflow_dispatch:
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-
-    steps:
-    - name: Set Image name
-      run: |
-        echo "IMAGE_NAME=k2patel/rtorrent:latest" >> $GITHUB_ENV
-
-    - name: Checkout code
-      uses: actions/checkout@v4
-
-    - name: Log in to Docker Hub
-      uses: docker/login-action@v3
-      with:
-        username: ${{ secrets.DOCKER_USERNAME }}
-        password: ${{ secrets.DOCKER_TOKEN }}
-
-    - name: Build the Docker image
-      id: build
-      run: |
-        docker build . -t ${{ env.IMAGE_NAME }}
-
-    - name: Push the Docker image
-      run: docker push ${{ env.IMAGE_NAME }}

README.md

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 # docker-rtorrent
 This is plain simple rtorrent with proxy and custom rtorrent.rc
 
+Source: https://git.k2patel.in/k2patel/docker-rtorrent
+
+Gitea Actions builds and publishes `docker.io/k2patel/rtorrent:latest`
+on pushes to `main`, manually, and monthly on the third day at 00:00 UTC.
+The repository requires Actions secrets `DOCKER_USERNAME` and `DOCKER_TOKEN`
+(a Docker Hub token with write access to `k2patel/rtorrent`).
+
+Builds run on the remote Kubernetes runner for `linux/amd64`, matching the
+previous GitHub build. Buildx pushes directly to Docker Hub without loading
+the image into the runner's Docker image store. Its temporary builder and
+build cache are removed after each job; no image archives or build records
+are uploaded to Gitea, and no local container builds are required.
+
 # Latest 0.16 version caveat
  - since version 0.16 explicitly set `network.bind_address.set = 0.0.0.0`, when ipv6 is disabled on kernel.