feat(P01): SLICE-01+02 — Dockerfile, .dockerignore, docker-compose.yml, FastAPI StaticFiles, PRAXIS_DB_PATH env (G-102 fix)

SLICE-01 (lead-developer): multi-stage Dockerfile (node:22-slim→python:3.12-slim),
  .dockerignore (excludes secrets/node_modules/.git), docker-compose.yml
  (port 8789, SQLite volume, env injection for all voice-service vars)
SLICE-02 (backend-engineer+data-engineer): FastAPI mounts client/dist as
  StaticFiles at / after API routes (D-023, REQ-DEPLOY-13).
  G-102 MUST fix: db/store.py + db/migrate.py now read PRAXIS_DB_PATH
  from env so the Docker volume mount persists SQLite data.
G-105 FIX: Dockerfile copies pyproject.toml before source (pip install
  layer cached, source changes don't invalidate).

REQ-DEPLOY-01, 02, 13, 16 covered.

---ci---
project: praxis
phase: 1
milestone: v0.2
status: execute
slice: 01-02
wave: 1
---/ci---

docker-compose.yml

@@ -0,0 +1,48 @@
+# Praxis v0.2 — Docker Compose service definition
+# Runs the praxis server inside a Docker container (inside an LXC CT).
+# Per RESEARCH.md Q4/Q8 / ARCHITECTURE.md §v0.2 Deployment Architecture.
+
+services:
+  praxis:
+    build: .
+    image: praxis:latest
+    restart: on-failure
+    ports:
+      - "8789:8789"
+    volumes:
+      # SQLite DB persistence — survives container recreation (G-102).
+      - praxis-data:/app/data
+    environment:
+      PRAXIS_HOST: "0.0.0.0"
+      PRAXIS_PORT: "8789"
+      PRAXIS_DB_PATH: "/app/data/praxis.db"
+      PRAXIS_SCENARIOS_DIR: "/app/scenarios"
+      PRAXIS_TTS: "${PRAXIS_TTS:-cartesia}"
+      PRAXIS_SCENARIO: "${PRAXIS_SCENARIO:-customer_service_refund_ca_v01}"
+      # Voice-service keys (empty if unprovisioned — server degrades gracefully)
+      DEEPGRAM_API_KEY: "${DEEPGRAM_API_KEY:-}"
+      CARTESIA_API_KEY: "${CARTESIA_API_KEY:-}"
+      OLLAMA_API_KEY: "${OLLAMA_API_KEY:-}"
+      # Ollama Cloud endpoints (D-020)
+      OLLAMA_BASE_URL: "${OLLAMA_BASE_URL:-https://ollama.com/v1}"
+      OLLAMA_CHAT_URL: "${OLLAMA_CHAT_URL:-https://ollama.com/api/chat}"
+      OLLAMA_ROLEPLAY_MODEL: "${OLLAMA_ROLEPLAY_MODEL:-gemma4:cloud}"
+      OLLAMA_DEBRIEF_MODEL: "${OLLAMA_DEBRIEF_MODEL:-deepseek-v4-flash:cloud}"
+      # Deepgram (D-013)
+      DEEPGRAM_MODEL: "${DEEPGRAM_MODEL:-nova-3}"
+      DEEPGRAM_LANGUAGE: "${DEEPGRAM_LANGUAGE:-en}"
+      DEEPGRAM_REGION: "${DEEPGRAM_REGION:-na}"
+      # Cartesia (D-014)
+      CARTESIA_VOICE_ID: "${CARTESIA_VOICE_ID:-a3536a36-1d18-4efb-a95a-7c44b7b5e384}"
+    env_file:
+      # /etc/praxis/server.env is written by install-service.sh with
+      # secrets injected via lxc.environment (G-101 fix: GITEA_TOKEN baked
+      # into the snippet; voice keys from lxc.environment).
+      - /etc/praxis/server.env
+    restart_policy:
+      condition: on-failure
+      max_attempts: 3
+
+volumes:
+  praxis-data:
+    driver: local