Fix installation order for SAM 3D Body

- Install PyTorch first, which is required by Detectron2
- Move installation of Detectron2, MoGe, and SAM 3D Body to Dockerfile
- Ensure proper installation order following official guide

Dockerfile

@@ -13,16 +13,19 @@ RUN apt-get update && apt-get install -y \
 # Copy requirements file
 COPY requirements.txt .
 
-# Install Python dependencies
+# 1. Install PyTorch first (required by Detectron2)
+RUN pip install --no-cache-dir torch==2.1.1 torchvision==0.16.1
+
+# 2. Install Python dependencies from requirements.txt
 RUN pip install --no-cache-dir -r requirements.txt
 
-# Install Detectron2
+# 3. Install Detectron2 (after PyTorch is installed)
 RUN pip install --no-cache-dir 'git+https://github.com/facebookresearch/detectron2.git@a1ce2f9' --no-build-isolation --no-deps
 
-# Optional: Install MoGe
+# 4. Install MoGe
 RUN pip install --no-cache-dir git+https://github.com/microsoft/MoGe.git
 
-# Install SAM 3D Body from source
+# 5. Install SAM 3D Body from source
 RUN git clone https://github.com/facebookresearch/sam-3d-body.git /app/sam-3d-body && \
     cd /app/sam-3d-body && \
     pip install -e .

requirements.txt

@@ -40,12 +40,8 @@ optree==0.10.0
 fvcore==0.1.5.post20221221
 huggingface_hub==0.20.2
 
-# SAM 3D Body dependencies - based on official installation guide
-# Install Detectron2 (required by SAM 3D Body)
-git+https://github.com/facebookresearch/detectron2.git@a1ce2f9
-
-# Install MoGe (optional but recommended for SAM 3D Body)
-git+https://github.com/microsoft/MoGe.git
+# SAM 3D Body dependencies - these are installed directly in Dockerfile
+# in the correct order: PyTorch -> requirements -> Detectron2 -> MoGe -> SAM 3D Body
 
 # 3D model processing
 trimesh==4.0.5