docs: update README/INTERNALS for import feature, harden .gitignore

.github/workflows/docker-publish.yml

@@ -0,0 +1,36 @@
+name: Build & Push Docker Image
+
+on:
+  push:
+    branches: [main]
+    paths-ignore:
+      - '*.md'
+      - 'backup_*/**'
+      - '.gitignore'
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: true
+          platforms: linux/amd64,linux/arm64
+          tags: |
+            p0luz/ombre-brain:latest
+            p0luz/ombre-brain:${{ github.sha }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max