Added FastAPI deployment files

Dockerfile

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+FROM python:3.9-slim
+WORKDIR /app
+COPY requirements.txt .
+RUN pip install -r requirements.txt
+COPY . .
+CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860"]

app.py

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+from fastapi import FastAPI
+app = FastAPI()
+@app.get("/")
+def home():
+    return {"status": "API ready"}

models/model_87_acc_20_frames_final_data.pt

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+version https://git-lfs.github.com/spec/v1
+oid sha256:0f1b48a51886f487e7ce9880a59ddf6c44e7da0d5b5265ed772871e1e9b1c578
+size 226547455

nixpacks.toml

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+[phases.setup]
+nixPkgs = [
+    "python311",
+    "python311Packages.pip",
+    "python311Packages.virtualenv",  # Alternative to venv
+    "cmake",
+    "gcc",
+    "gnumake",
+    "pkg-config"
+]
+
+[phases.install]
+cmds = [
+    "python -m virtualenv /opt/venv",
+    ". /opt/venv/bin/activate",
+    "pip install --upgrade pip",
+    "pip install -r requirements.txt"
+]
+
+[start]
+cmd = ". /opt/venv/bin/activate && uvicorn app:app --host 0.0.0.0 --port $PORT"

requirements.txt

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+fastapi
+uvicorn
+torch
+torchvision
+numpy
+opencv-python
+face_recognition
+pillow
+matplotlib
+motor