Initial AuroraIMG-6M API

An authenticated CPU text-to-image API for direct-img, serving an ONNX
conversion of AuroraAI-Research/AuroraIMG-6M (Apache-2.0). About 0.4s per
image and ~150-200 MB RAM. Output matches the original pipeline to within
1/255 per pixel.

Pushes to main build ghcr.io/direct-img/auroraimg-6m:main and trigger the
Dokploy deploy webhook.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

.github/workflows/docker.yml

@@ -0,0 +1,45 @@
+name: Build and Deploy
+
+on:
+  push:
+    branches: ['main']
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+env:
+  IMAGE: ghcr.io/direct-img/auroraimg-6m
+
+jobs:
+  build-and-deploy:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: docker/setup-buildx-action@v3
+
+      - uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: true
+          tags: |
+            ${{ env.IMAGE }}:main
+            ${{ env.IMAGE }}:sha-${{ github.sha }}
+          labels: org.opencontainers.image.source=${{ github.server_url }}/${{ github.repository }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+
+      - name: Trigger Dokploy deployment
+        run: curl -fsS -X POST "${{ secrets.DOKPLOY_WEBHOOK_URL }}"