chore: deployment configs - Dockerfile (HF Spaces), vercel.json, pinned deps

backend/.dockerignore

@@ -0,0 +1,8 @@
+__pycache__
+*.pyc
+.env
+.venv
+venv
+uploads/
+*.db
+.git

backend/Dockerfile

@@ -7,6 +7,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     poppler-utils \
     libpq-dev \
     gcc \
+    tesseract-ocr \
     && rm -rf /var/lib/apt/lists/*
 
 COPY requirements.txt .
@@ -14,5 +15,9 @@ RUN pip install --no-cache-dir -r requirements.txt
 
 COPY . .
 
+# HuggingFace Spaces uses port 7860
+ENV PORT=7860
+EXPOSE 7860
+
 # Run migrations and start server
-CMD ["sh", "-c", "alembic upgrade head && uvicorn app.main:app --host 0.0.0.0 --port 8000"]
+CMD ["sh", "-c", "alembic upgrade head && uvicorn app.main:app --host 0.0.0.0 --port ${PORT}"]

backend/requirements.txt

@@ -2,6 +2,7 @@
 fastapi==0.115.12
 uvicorn[standard]==0.34.2
 python-multipart==0.0.20
+starlette==0.41.3
 
 # HTTP
 requests==2.32.3
@@ -13,9 +14,9 @@ python-dotenv==1.1.0
 # Embeddings & chunking
 numpy==1.26.4
 sentence-transformers==4.1.0
-langchain-core
-langchain-text-splitters
-langchain-experimental
+langchain-core>=0.3.0,<0.4.0
+langchain-text-splitters>=0.3.0,<0.4.0
+langchain-experimental>=0.3.0,<0.4.0
 
 # Document parsing
 docling==2.97.0
@@ -34,8 +35,8 @@ markdown==3.8
 # Database
 sqlalchemy==2.0.41
 psycopg2-binary==2.9.10
-pgvector
-alembic
+pgvector>=0.2.0,<1.0.0
+alembic>=1.13.0,<2.0.0
 
 # Auth
 passlib[bcrypt]==1.7.4
@@ -47,21 +48,23 @@ pydantic==2.11.5
 email-validator==2.2.0
 
 # Agentic workflow
-langgraph
-langchain
-langchain-groq
-
+langgraph>=0.2.0,<1.0.0
+langchain>=0.3.0,<0.4.0
+langchain-groq>=0.2.0,<1.0.0
 
 grandalf==0.8
 
 # MCP Server
 mcp>=1.0.0,<2.0.0
 
-# Async for MCP
+# Async
 anyio>=4.0.0
 
 # LangGraph checkpoints
 psycopg[binary]>=3.1.0
 
+# SSE
+sse-starlette<2.0
+
 # Testing
 pytest>=7.0.0

frontend/vercel.json

@@ -0,0 +1,8 @@
+{
+  "buildCommand": "npm run build",
+  "outputDirectory": "dist",
+  "framework": "vite",
+  "rewrites": [
+    { "source": "/(.*)", "destination": "/index.html" }
+  ]
+}