Extension Platform: API server + React dashboard

- Python API server with Gitea-based build (no local files needed)
- PostgreSQL on Coolify internal network
- React + Vite + Tailwind dashboard
- Endpoints: /publish, /deploy, /deploy-all, /api/*
- Dockerfile: multi-stage (Node build + Python runtime)

Dockerfile

@@ -0,0 +1,18 @@
+FROM node:20-alpine AS dashboard-build
+WORKDIR /dashboard
+COPY dashboard/package*.json ./
+RUN npm ci
+COPY dashboard/ .
+RUN npm run build
+
+FROM python:3.12-alpine
+RUN apk add --no-cache postgresql-client
+WORKDIR /app
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+COPY server.py .
+COPY --from=dashboard-build /dashboard/dist /app/dashboard/dist
+ENV PORT=8080
+ENV DIST_DIR=/app/dashboard/dist
+EXPOSE 8080
+CMD ["python", "server.py"]