Initial commit: Nicotine-Less Docker container

A containerized Nicotine+ (Soulseek client) with noVNC web interface.

Features:
- Web-based VNC access with dynamic screen resizing
- Firefox ESR browser included for port testing
- Multi-architecture support (amd64, arm64)
- Automated builds when Nicotine+ releases new versions
- Mirrored Alpine base image to avoid Docker Hub rate limiting

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

.gitea/workflows/mirror-alpine.yml

@@ -0,0 +1,29 @@
+name: Mirror Alpine Image
+
+on:
+  schedule:
+    - cron: '0 3 * * 0'  # Weekly on Sunday at 3 AM
+  workflow_dispatch:
+
+jobs:
+  mirror:
+    runs-on: linux-amd64
+    container:
+      image: git.nicola.sh/public/alpine:latest
+    steps:
+      - name: Install Docker CLI
+        run: |
+          apk add --no-cache docker-cli
+
+      - name: Pull Alpine from Docker Hub
+        run: |
+          docker pull alpine:latest
+
+      - name: Login to Gitea Container Registry
+        run: |
+          echo "${{ secrets.REGISTRY_PASSWORD }}" | docker login git.nicola.sh -u "${{ secrets.REGISTRY_USERNAME }}" --password-stdin
+
+      - name: Tag and push to Gitea registry
+        run: |
+          docker tag alpine:latest git.nicola.sh/public/alpine:latest
+          docker push git.nicola.sh/public/alpine:latest