Remove redundant dependencies, update versions and modernize Dockerfile

Dockerfile

@@ -1,9 +1,13 @@
-FROM python:3.12-slim-bookworm
+FROM python:3.13-slim-bookworm
 
-COPY app /app
-COPY README.md /README.md
-COPY requirements.txt /requirements.txt
+COPY --from=ghcr.io/astral-sh/uv:latest /uv /usr/local/bin/uv
 
-RUN pip install -r requirements.txt
+WORKDIR /app
 
-CMD ["python", "-m", "app.app"]
+COPY pyproject.toml uv.lock ./
+RUN uv sync --frozen --no-dev --no-install-project
+
+COPY app ./app
+COPY README.md ./
+
+CMD ["uv", "run", "python", "-m", "app.app"]

app/app.py

@@ -6,8 +6,8 @@
 import logging
 from collections.abc import AsyncIterator
 from contextlib import asynccontextmanager
+from zoneinfo import ZoneInfo
 
-import pytz
 import uvicorn
 from fastapi import BackgroundTasks, FastAPI
 from fastapi.exceptions import RequestValidationError
@@ -20,7 +20,7 @@
 from app.models import RequestModel, ResponseModel
 from app.pesu import PESUAcademy
 
-IST = pytz.timezone("Asia/Kolkata")
+IST = ZoneInfo("Asia/Kolkata")
 CSRF_TOKEN_REFRESH_INTERVAL_SECONDS = 45 * 60
 CSRF_TOKEN_REFRESH_LOCK = asyncio.Lock()
 

pyproject.toml

@@ -13,7 +13,6 @@ dependencies = [
     "uvicorn>=0.27.0",
     "httpx>=0.28.1",
     "pydantic>=2.6.0",
-    "pytz>=2025.2",
     "selectolax>=0.3.30",
 ]
 

requirements.txt

@@ -1,18 +1,20 @@
 # This file was autogenerated by uv via the following command:
 #    uv pip compile pyproject.toml
+annotated-doc==0.0.4
+    # via fastapi
 annotated-types==0.7.0
     # via pydantic
-anyio==4.9.0
+anyio==4.13.0
     # via
     #   httpx
     #   starlette
-certifi==2025.7.14
+certifi==2026.5.20
     # via
     #   httpcore
     #   httpx
-click==8.2.1
+click==8.4.0
     # via uvicorn
-fastapi==0.116.1
+fastapi==0.136.1
     # via pesu-auth (pyproject.toml)
 h11==0.16.0
     # via
@@ -22,33 +24,29 @@ httpcore==1.0.9
     # via httpx
 httpx==0.28.1
     # via pesu-auth (pyproject.toml)
-idna==3.10
+idna==3.16
     # via
     #   anyio
     #   httpx
-pydantic==2.11.7
+pydantic==2.13.4
     # via
     #   pesu-auth (pyproject.toml)
     #   fastapi
-pydantic-core==2.33.2
+pydantic-core==2.46.4
     # via pydantic
-pytz==2025.2
-    # via pesu-auth (pyproject.toml)
-selectolax==0.3.32
+selectolax==0.4.9
     # via pesu-auth (pyproject.toml)
-sniffio==1.3.1
-    # via anyio
-starlette==0.47.2
+starlette==1.0.1
     # via fastapi
-typing-extensions==4.14.1
+typing-extensions==4.15.0
     # via
-    #   anyio
     #   fastapi
     #   pydantic
     #   pydantic-core
-    #   starlette
     #   typing-inspection
-typing-inspection==0.4.1
-    # via pydantic
-uvicorn==0.35.0
+typing-inspection==0.4.2
+    # via
+    #   fastapi
+    #   pydantic
+uvicorn==0.47.0
     # via pesu-auth (pyproject.toml)