build: package local admin service

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

.env.example

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+# .env.example
+ADMIN_PASSWORD=change-me
+SECRET_KEY=replace-with-at-least-16-random-characters
+CREDENTIAL_ENCRYPTION_KEY=replace-with-a-valid-fernet-key
+SYNC_INTERVAL_MINUTES=5
+DATA_DIR=/data
+DATABASE_URL=sqlite:////data/app.db

Dockerfile

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+# Dockerfile
+FROM python:3.12-slim
+WORKDIR /app
+COPY pyproject.toml /app/
+RUN pip install --no-cache-dir .
+COPY app /app/app
+RUN mkdir -p /data && chmod 700 /data
+ENV DATA_DIR=/data
+EXPOSE 8080
+CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8080"]

docker-compose.example.yml

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+services:
+  sync:
+    build: .
+    env_file: .env
+    ports:
+      - "8080:8080"
+    volumes:
+      - ./data:/data
+    restart: unless-stopped