fix(docker): use git clone to properly resolve LFS files

Docker COPY doesn't resolve Git LFS pointers during build. Instead,
clone the repo at build time (with git lfs pull) to get actual files.
This ensures ONNX model files are properly available in the container.

Co-Authored-By: Claude <noreply@anthropic.com>

Dockerfile

@@ -2,35 +2,28 @@ FROM node:20-slim
 
 ENV DEBIAN_FRONTEND=noninteractive
 
-# Build timestamp: 2026-01-17T16:00
+# Build timestamp: 2026-01-17T16:30
 
 WORKDIR /app
 
 # Install git and git-lfs for handling large files
-RUN apt-get update && apt-get install -y git git-lfs && git lfs install && rm -rf /var/lib/apt/lists/*
-
-# Copy backend package.json and install ALL deps (including dev for tsx)
-COPY trigo-web/backend/package.json ./package.json
+RUN apt-get update && apt-get install -y git git-lfs ca-certificates && git lfs install && rm -rf /var/lib/apt/lists/*
+
+# Clone the repository with LFS files - this properly resolves LFS pointers
+ARG REPO_URL=https://huggingface.co/spaces/k-l-lambda/trigo
+RUN git clone --depth 1 ${REPO_URL} /tmp/repo && \
+    cd /tmp/repo && \
+    git lfs pull && \
+    cp -r trigo-web/backend/src/ /app/backend/src/ && \
+    cp -r trigo-web/inc/ /app/inc/ && \
+    cp -r trigo-web/app/dist/ /app/app/dist/ && \
+    cp trigo-web/backend/package.json /app/package.json && \
+    cp trigo-web/backend/.env /app/backend/.env && \
+    rm -rf /tmp/repo
+
+# Install ALL deps (including dev for tsx)
 RUN npm install
 
-# Copy backend source
-COPY trigo-web/backend/src/ ./backend/src/
-
-# Copy inc folder
-COPY trigo-web/inc/ ./inc/
-
-# Copy frontend dist
-COPY trigo-web/app/dist/ ./app/dist/
-
-# Fetch LFS files (in case COPY only got pointers)
-COPY .git/ ./.git/
-COPY .gitattributes ./
-RUN git lfs pull || true
-RUN rm -rf .git .gitattributes
-
-# Copy env files (only .env, .env.local is for local development only)
-COPY trigo-web/backend/.env ./backend/.env
-
 # Create a Docker-specific entry point that sets correct paths
 RUN echo 'import express from "express"; \
 import { createServer } from "http"; \