fix: devcontainer build and setup on fresh clones

.devcontainer/devcontainer.json

@@ -11,12 +11,16 @@
   },
   "mounts": [
     "source=${localEnv:USERPROFILE}/.ssh,target=/mnt/host-ssh,type=bind,readonly",
-    "source=/var/run/docker.sock,target=/var/run/docker-host.sock,type=bind",
     "source=kirche-opencode-share,target=/home/vscode/.local/share/opencode,type=volume",
     "source=kirche-opencode-config,target=/home/vscode/.config/opencode,type=volume"
   ],
   "features": {
-    "ghcr.io/devcontainers/features/docker-outside-of-docker:1": {}
+    // moby:false — python:3.12-slim is Debian trixie now, whose repos have
+    // no moby-cli (feature default). false installs the upstream Docker CE
+    // CLI instead, which supports trixie.
+    "ghcr.io/devcontainers/features/docker-outside-of-docker:1": {
+      "moby": false
+    }
   },
   "overrideCommand": false,
   "postCreateCommand": "sudo -E bash .devcontainer/setup.sh",

.devcontainer/setup.sh

@@ -2,10 +2,19 @@
 # Dev-only setup (runs via postCreateCommand in the attached `api` container).
 # Production needs none of this: images carry their dependencies and the
 # api entrypoint migrates on every start.
-set -e
+set -eo pipefail
 
 REPO=/srv/kirche-einfach
 
+# Run a command as vscode with the current environment intact.
+# (`su vscode -c` resets the environment, which used to drop
+# UV_PROJECT_ENVIRONMENT/UV_PYTHON_INSTALL_DIR plus every compose-provided
+# variable — uv then created a project-local backend/.venv in the bind-mount
+# instead of using /opt/venv, and sync_flows.py ran without its settings.)
+as_vscode() {
+  sudo -u vscode -E bash -c "$*"
+}
+
 # Venv lives outside the bind-mount (see backend/Dockerfile).
 export UV_PYTHON_INSTALL_DIR=/opt/python UV_PROJECT_ENVIRONMENT=/opt/venv
 
@@ -33,22 +42,26 @@ chown -R vscode:vscode "$REPO/backend/data" \
 # the editor; uv resolves at setup time, no lockfile is committed).
 echo "--- Installing Python dependencies ---"
 cd "$REPO/backend"
-su vscode -c "uv sync"
+as_vscode "uv sync"
 
 # opencode CLI (dev tooling; intentionally not baked into the image).
 if [ ! -x /home/vscode/.opencode/bin/opencode ]; then
   echo "--- Installing opencode ---"
-  su vscode -c "curl -fsSL https://opencode.ai/install | bash"
+  as_vscode "curl -fsSL https://opencode.ai/install | bash"
   ln -sf /home/vscode/.opencode/bin/opencode /usr/local/bin/opencode
 fi
 
 # Compose services (langflow, lfx) must be up; fail loudly otherwise.
 # (api/frontend are starting alongside this script.)
-echo "--- Waiting for compose services ---"
+# Fresh clones have no `.env` (gitignored) and compose `env_file` is
+# optional, so provision one from the example instead of failing setup.
+# Fill in real secrets afterwards; empty SMTP_* means the API logs mail.
 if [ ! -f "$REPO/.env" ]; then
-  echo "ERROR: $REPO/.env is missing. Copy .env.example to .env and fill in secrets." >&2
+  echo "WARN: $REPO/.env missing — copying .env.example (fill in secrets)."
-  exit 1
+  cp "$REPO/.env.example" "$REPO/.env"
+  chown vscode:vscode "$REPO/.env" 2>/dev/null || true
 fi
+echo "--- Waiting for compose services ---"
 python3 - <<'EOF'
 import socket
 import sys
@@ -79,7 +92,7 @@ EOF
 # entrypoint on every start).
 echo "--- Syncing canonical flows ---"
 cd "$REPO/backend"
-su vscode -c "uv run python scripts/sync_flows.py --sync" || echo "WARN: flow sync failed (check backend/flows and LFX)"
+as_vscode "uv run python scripts/sync_flows.py --sync" || echo "WARN: flow sync failed (check backend/flows and LFX)"
 
 echo ""
 echo "=== Setup complete ==="

backend/.dockerignore

@@ -0,0 +1,9 @@
+# Keep the build context lean: only pyproject/alembic/entrypoint plus
+# app/migrations/scripts are COPYed. Local venvs, databases and caches must
+# never enter the context (slow builds, root-owned file leaks).
+.venv/
+data/
+__pycache__/
+*.py[cod]
+.pytest_cache/
+uv.lock

backend/Dockerfile

@@ -16,9 +16,10 @@ ENV PATH="/opt/venv/bin:$PATH"
 COPY --from=ghcr.io/astral-sh/uv:latest /uv /usr/local/bin/uv
 
 # Foundational, inert in prod: non-root user for the editor, sudo for setup,
-# openssh-client for the devcontainer post-start hook.
+# openssh-client for the devcontainer post-start hook, curl for the opencode
+# installer in setup.sh, git for the VS Code source-control view.
 RUN apt-get update \
-    && apt-get install -y --no-install-recommends sudo openssh-client \
+    && apt-get install -y --no-install-recommends sudo openssh-client curl git ca-certificates \
     && rm -rf /var/lib/apt/lists/* \
     && useradd -m -s /bin/bash vscode \
     && echo "vscode ALL=(ALL) NOPASSWD:ALL" > /etc/sudoers.d/vscode \

backend/entrypoint.sh

@@ -16,6 +16,12 @@ fi
 
 /opt/venv/bin/alembic upgrade head
 
+# Migrate ran as root: hand the (possibly just created) DB files back to
+# vscode so editor-run commands stay writable.
+if id vscode >/dev/null 2>&1; then
+  chown -R vscode:vscode data 2>/dev/null || true
+fi
+
 if [ "${APP_ENV:-prod}" = "dev" ]; then
   exec /opt/venv/bin/uvicorn app.main:app --host 0.0.0.0 --port 8000 --reload
 else

docker-compose.yml

@@ -12,7 +12,11 @@ services:
       context: ./backend
       dockerfile: Dockerfile
     env_file:
-      - .env
+      # Optional: fresh clones and CI checkouts have no `.env` (gitignored);
+      # containers must still create so `config`/`build` work everywhere.
+      # Runtime secrets come from `.env` when present (see setup.sh).
+      - path: .env
+        required: false
     volumes:
       # No venv volume by design: the venv lives at /opt/venv (image-local,
       # see backend/Dockerfile). A named volume here used to shadow the image
@@ -43,7 +47,11 @@ services:
       context: ./frontend
       dockerfile: Dockerfile
     env_file:
-      - .env
+      # Optional: fresh clones and CI checkouts have no `.env` (gitignored);
+      # containers must still create so `config`/`build` work everywhere.
+      # Runtime secrets come from `.env` when present (see setup.sh).
+      - path: .env
+        required: false
     environment:
       # Dev default (HMR); prod .env sets `preview` (build + serve bundle).
       FRONTEND_MODE: ${FRONTEND_MODE:-dev}
@@ -65,7 +73,11 @@ services:
     # .env.example) together with Dockerfile.lfx + backend `lfx~=` pin.
     image: langflowai/langflow:${LANGFLOW_VERSION:-1.12.0}
     env_file:
-      - .env
+      # Optional: fresh clones and CI checkouts have no `.env` (gitignored);
+      # containers must still create so `config`/`build` work everywhere.
+      # Runtime secrets come from `.env` when present (see setup.sh).
+      - path: .env
+        required: false
     environment:
       # Static values only; secrets/URLs come from .env via env_file.
       LANGFLOW_CONFIG_DIR: /app/langflow
@@ -104,7 +116,11 @@ services:
       context: .
       dockerfile: Dockerfile.lfx
     env_file:
-      - .env
+      # Optional: fresh clones and CI checkouts have no `.env` (gitignored);
+      # containers must still create so `config`/`build` work everywhere.
+      # Runtime secrets come from `.env` when present (see setup.sh).
+      - path: .env
+        required: false
     volumes:
       - lfx-data:/flows
     ports:

frontend/.dockerignore

@@ -0,0 +1,6 @@
+# Never bake host build output into the Linux image: the host checkout runs
+# on Windows, so a copied node_modules would shadow the image install with
+# wrong-platform binaries and diverge from package-lock.json.
+node_modules/
+dist/
+*.tsbuildinfo