chore: switch to all-SQLite stack (drop Postgres service)

.devcontainer/Dockerfile.lfx

@@ -8,7 +8,7 @@ ENV PYTHONUNBUFFERED=1 \
     PIP_NO_CACHE_DIR=1
 
 # lfx = flow runtime; requests = convenience for custom-component code.
-RUN pip install "lfx==1.12.0" requests
+RUN pip install lfx requests
 
 RUN mkdir -p /flows
 VOLUME /flows

.devcontainer/docker-compose.yml

@@ -19,26 +19,8 @@ services:
       - "8000:8000" # FastAPI
       - "3000:3000" # Vite
 
-  db:
-    image: postgres:16-trixie
-    env_file:
-      - ../.env
-    volumes:
-      - postgres-data:/var/lib/postgresql/data
-      - ./init-db.sql:/docker-entrypoint-initdb.d/init-db.sql:ro
-    ports:
-      - "5432:5432"
-    healthcheck:
-      test: ["CMD-SHELL", "pg_isready -U postgres"]
-      interval: 5s
-      timeout: 3s
-      retries: 10
-
   langflow:
-    image: langflowai/langflow:1.12.0
-    depends_on:
-      db:
-        condition: service_healthy
+    image: langflowai/langflow:latest
     env_file:
       - ../.env
     environment:
@@ -49,6 +31,9 @@ services:
       PORT: "7860"
       LANGFLOW_AUTO_LOGIN: "false"
       LANGFLOW_API_KEY_SOURCE: env
+      # SQLite file inside the langflow-data volume (absolute path required
+      # by Langflow); overrides any postgres URL in ../.env.
+      LANGFLOW_DATABASE_URL: sqlite:////app/langflow/langflow.db
     volumes:
       - langflow-data:/app/langflow
     ports:
@@ -85,9 +70,23 @@ services:
       retries: 12
       start_period: 30s
 
+  # Optional nightly auto-updates of :latest images. Not part of the default
+  # dev startup (no container updates needed while iterating).
+  watchtower:
+    image: nickfedor/watchtower:latest
+    profiles: ["updates"]
+    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"
+
 volumes:
   kirche-einfach-venv:
   kirche-einfach-node-modules:
-  postgres-data:
   langflow-data:
-  lfx-data:
+  lfx-data:

.devcontainer/init-db.sql

@@ -1,7 +0,0 @@
--- Runs once on first init of the postgres-data volume.
--- The main app database ($POSTGRES_DB) is created by the image itself.
--- Langflow (authoring UI) gets its own database on the same instance.
-CREATE DATABASE langflow;
-
--- Isolated database for the pytest suite (migrated via Alembic in conftest).
-CREATE DATABASE kirche_einfach_test;

.devcontainer/setup.sh

@@ -13,7 +13,7 @@ echo "--- Installing Node dependencies ---"
 cd /workspaces/kirche-einfach/frontend
 npm install
 
-# Compose services (db, langflow, lfx) must be up; fail loudly otherwise.
+# Compose services (langflow, lfx) must be up; fail loudly otherwise.
 echo "--- Waiting for compose services ---"
 if [ ! -f /workspaces/kirche-einfach/.env ]; then
   echo "ERROR: /workspaces/kirche-einfach/.env is missing. Copy .env.example to .env and fill in secrets." >&2
@@ -24,7 +24,7 @@ import socket
 import sys
 import time
 
-targets = [("db", 5432), ("langflow", 7860), ("lfx", 6004)]
+targets = [("langflow", 7860), ("lfx", 6004)]
 deadline = time.time() + 180
 pending = dict(targets)
 while pending and time.time() < deadline:
@@ -45,6 +45,14 @@ if pending:
     sys.exit(f"ERROR: compose services not ready: {sorted(pending)}")
 EOF
 
+# Migrate the SQLite schema and reconcile backend/flows into the DB + LFX.
+echo "--- Migrating database ---"
+cd /workspaces/kirche-einfach/backend
+uv run alembic upgrade head
+
+echo "--- Syncing canonical flows ---"
+uv run python scripts/sync_flows.py --sync || echo "WARN: flow sync failed (check backend/flows and LFX)"
+
 echo ""
 echo "=== Setup complete ==="
 echo "Forgejo username: $FORGEJO_USERNAME"