Initial commit: Pixel AI comic/video creation platform

- FastAPI backend with SQLModel, Alembic migrations, AgentScope agents
- Next.js 15 frontend with React 19, Tailwind, Zustand, React Flow
- Multi-provider AI system (DashScope, Kling, MiniMax, Volcengine, OpenAI, etc.)
- All HTTP clients migrated from sync requests to async httpx
- Admin-managed API keys via environment variables
- SSRF vulnerability fixed in ensure_url()

frontend/Dockerfile

@@ -0,0 +1,37 @@
+FROM node:20-alpine AS builder
+
+WORKDIR /app
+
+# Copy dependency files
+COPY package.json package-lock.json ./
+
+# Install dependencies
+RUN npm ci
+
+# Copy source code
+COPY . .
+
+# Build argument for API URL
+ARG API_URL
+ENV API_URL=$API_URL
+
+# Build the application
+RUN npm run build
+
+# Production image
+FROM node:20-alpine AS runner
+
+WORKDIR /app
+
+ENV NODE_ENV=production
+
+# Copy built artifacts from builder
+COPY --from=builder /app/public ./public
+COPY --from=builder /app/.next/standalone ./
+COPY --from=builder /app/.next/static ./.next/static
+
+# Expose port
+EXPOSE 3000
+
+# Start command
+CMD ["node", "server.js"]