Initial commit: Nicotine-Less Docker container

Lightweight Docker container for Nicotine+ with noVNC web interface and Firefox ESR browser.

Features:
- noVNC web interface with dynamic resize support
- Firefox ESR for testing ports and browsing
- TigerVNC with AcceptSetDesktopSize enabled
- Supervisor for process management
- Configurable user/group permissions

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

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

.gitea/workflows/build-builder.yml

@@ -0,0 +1,85 @@
+name: Build Base Runner Image
+
+on:
+  push:
+    paths:
+      - 'Dockerfile.builder'
+      - '.gitea/workflows/build-builder.yml'
+  workflow_dispatch:
+
+jobs:
+  build-builder:
+    strategy:
+      matrix:
+        include:
+          - platform: linux/amd64
+            runner: linux-amd64
+          - platform: linux/arm64
+            runner: linux-arm64
+    runs-on: ${{ matrix.runner }}
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to Gitea Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: git.nicola.sh
+          username: ${{ secrets.REGISTRY_USERNAME }}
+          password: ${{ secrets.REGISTRY_PASSWORD }}
+
+      - name: Build and push builder by digest
+        id: build
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: Dockerfile.builder
+          platforms: ${{ matrix.platform }}
+          outputs: type=image,name=git.nicola.sh/public/nicotine-less-builder,push-by-digest=true,name-canonical=true,push=true
+          cache-from: type=registry,ref=git.nicola.sh/public/nicotine-less-builder:buildcache-${{ matrix.platform }}
+          cache-to: type=registry,ref=git.nicola.sh/public/nicotine-less-builder:buildcache-${{ matrix.platform }},mode=max
+
+      - name: Export digest
+        run: |
+          mkdir -p /tmp/digests
+          digest="${{ steps.build.outputs.digest }}"
+          touch "/tmp/digests/${digest#sha256:}"
+
+      - name: Upload digest
+        uses: actions/upload-artifact@v4
+        with:
+          name: digests-builder-${{ matrix.platform }}
+          path: /tmp/digests/*
+          if-no-files-found: error
+          retention-days: 1
+
+  merge-builder:
+    needs: build-builder
+    runs-on: linux-amd64
+    steps:
+      - name: Download digests
+        uses: actions/download-artifact@v4
+        with:
+          path: /tmp/digests
+          pattern: digests-builder-*
+          merge-multiple: true
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to Gitea Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: git.nicola.sh
+          username: ${{ secrets.REGISTRY_USERNAME }}
+          password: ${{ secrets.REGISTRY_PASSWORD }}
+
+      - name: Create manifest list and push
+        working-directory: /tmp/digests
+        run: |
+          docker buildx imagetools create \
+            -t git.nicola.sh/public/nicotine-less-builder:latest \
+            $(printf 'git.nicola.sh/public/nicotine-less-builder@sha256:%s ' *)