feat: minimal prod compose with watchtower auto-updates

backend/Dockerfile

@@ -0,0 +1,21 @@
+# Production image for the FastAPI backend.
+FROM python:3.12-slim
+
+ENV PYTHONUNBUFFERED=1 \
+    PIP_NO_CACHE_DIR=1
+
+COPY --from=ghcr.io/astral-sh/uv:latest /uv /usr/local/bin/uv
+
+WORKDIR /srv/backend
+COPY pyproject.toml alembic.ini ./
+COPY app ./app
+COPY migrations ./migrations
+COPY scripts ./scripts
+# No lockfile is committed; dependencies resolve at build time.
+RUN uv sync --no-dev
+
+ENV FLOWS_WATCH_ENABLED=true
+EXPOSE 8000
+
+# Migrate on start, then serve (watcher reconciles backend/flows automatically).
+CMD ["sh", "-c", ".venv/bin/alembic upgrade head && exec .venv/bin/uvicorn app.main:app --host 0.0.0.0 --port 8000"]

compose.prod.yml

@@ -0,0 +1,122 @@
+# Minimal self-hosted deployment (internal use: no TLS / reverse proxy).
+#
+# Flows are the bind-mounted ./backend/flows directory (source of truth);
+# the embedded API watcher reconciles them into the DB + LFX automatically.
+# Registry images (:latest) auto-update nightly via watchtower; locally
+# built images (app, lfx, frontend) update via `docker compose build --pull`.
+#
+# Usage: docker compose -f compose.prod.yml up -d --build
+services:
+  app:
+    build:
+      context: ./backend
+      dockerfile: Dockerfile
+    env_file:
+      - .env
+    environment:
+      DATABASE_URL: sqlite:////srv/backend/data/kirche.db
+      FLOWS_DIR: /srv/backend/flows
+      LFX_URL: http://lfx:6004
+      LANGFLOW_URL: http://langflow:7860
+      CALLBACK_BASE_URL: http://app:8000
+    volumes:
+      - ./backend/flows:/srv/backend/flows
+      - appdata:/srv/backend/data
+    ports:
+      - "8000:8000"
+    depends_on:
+      lfx:
+        condition: service_healthy
+      langflow:
+        condition: service_healthy
+    restart: unless-stopped
+    healthcheck:
+      test:
+        [
+          "CMD-SHELL",
+          "python -c \"import urllib.request; urllib.request.urlopen('http://localhost:8000/health', timeout=5)\"",
+        ]
+      interval: 30s
+      timeout: 5s
+      retries: 3
+      start_period: 30s
+
+  frontend:
+    build:
+      context: ./frontend
+      dockerfile: Dockerfile
+    ports:
+      - "3000:3000"
+    depends_on:
+      app:
+        condition: service_healthy
+    restart: unless-stopped
+
+  langflow:
+    image: langflowai/langflow:latest
+    env_file:
+      - .env
+    environment:
+      LANGFLOW_CONFIG_DIR: /app/langflow
+      LANGFLOW_HOST: 0.0.0.0
+      PORT: "7860"
+      LANGFLOW_AUTO_LOGIN: "false"
+      LANGFLOW_API_KEY_SOURCE: env
+      LANGFLOW_DATABASE_URL: sqlite:////app/langflow/langflow.db
+    volumes:
+      - langflow-data:/app/langflow
+    ports:
+      - "7860:7860"
+    labels:
+      com.centurylinklabs.watchtower.enable: "true"
+    restart: unless-stopped
+    healthcheck:
+      test:
+        [
+          "CMD-SHELL",
+          "python -c \"import urllib.request; urllib.request.urlopen('http://localhost:7860/health', timeout=5)\"",
+        ]
+      interval: 30s
+      timeout: 5s
+      retries: 20
+      start_period: 60s
+
+  lfx:
+    build:
+      context: .devcontainer
+      dockerfile: Dockerfile.lfx
+    env_file:
+      - .env
+    volumes:
+      - lfx-data:/flows
+    ports:
+      - "6004:6004"
+    restart: unless-stopped
+    healthcheck:
+      test:
+        [
+          "CMD-SHELL",
+          "python -c \"import urllib.request; urllib.request.urlopen('http://localhost:6004/health', timeout=5)\"",
+        ]
+      interval: 30s
+      timeout: 5s
+      retries: 12
+      start_period: 30s
+
+  watchtower:
+    image: nickfedor/watchtower:latest
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock
+    environment:
+      WATCHTOWER_LABEL_ENABLE: "true"
+      WATCHTOWER_SCHEDULE: "0 0 4 * * *"
+      WATCHTOWER_CLEANUP: "true"
+      WATCHTOWER_ROLLING_RESTART: "true"
+    labels:
+      com.centurylinklabs.watchtower.enable: "true"
+    restart: unless-stopped
+
+volumes:
+  appdata:
+  langflow-data:
+  lfx-data:

frontend/Dockerfile

@@ -0,0 +1,13 @@
+# Production image for the React UI (build + Vite preview; internal use).
+FROM node:22-slim
+
+WORKDIR /srv/frontend
+COPY package.json package-lock.json ./
+RUN npm ci
+COPY . ./
+RUN npm run build
+
+ENV VITE_API_PROXY_TARGET=http://app:8000
+EXPOSE 3000
+
+CMD ["npm", "run", "preview", "--", "--host", "0.0.0.0", "--port", "3000"]

frontend/vite.config.ts

@@ -12,4 +12,14 @@ export default defineConfig({
       },
     },
   },
+  preview: {
+    port: 3000,
+    proxy: {
+      "/api": {
+        // Overridable at container start (prod compose: http://app:8000).
+        target: process.env.VITE_API_PROXY_TARGET ?? "http://localhost:8000",
+        changeOrigin: true,
+      },
+    },
+  },
 });