feat: initial KosmoConnect platform v0.1

Includes:
- Backend services: ingestion (:8001), weather API (:8002),
  gateway (:8003), billing (:8004) with BTCPay integration
- Shared asyncpg pool, TimescaleDB hypertable, Redis, Mosquitto MQTT
- React frontend: Dashboard (MapLibre) and Messaging (chat UI)
- Bridge daemon for Pi + Meshtastic (Serial/TCP T-Deck support)
- Production Docker Compose, Nginx reverse proxy, ops scripts
- DEPLOY.md with step-by-step deployment guide

backend/Dockerfile

@@ -0,0 +1,21 @@
+# KosmoConnect Backend Services
+# Build context: backend/
+FROM python:3.13-slim
+
+WORKDIR /app
+
+# Install build dependencies for packages that may need compilation
+RUN apt-get update && apt-get install -y --no-install-recommends gcc && rm -rf /var/lib/apt/lists/*
+
+# Copy requirements and install
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy application code
+COPY . .
+
+ENV PYTHONPATH=/app:/app/shared
+ENV PYTHONUNBUFFERED=1
+
+# Default to API service; override CMD per service
+CMD ["uvicorn", "api.src.main:app", "--host", "0.0.0.0", "--port", "8000"]