refactor: optimize Dockerfile for virtual environment setup and streamline package installation

Dockerfile

@@ -2,22 +2,15 @@ FROM python:3.11.10
 
 WORKDIR /code
 
-RUN pip install uv
-
-ENV VIRTUAL_ENV=/code/venv
+RUN pip install --no-cache-dir uv
+ENV VIRTUAL_ENV=/code/.venv
 RUN uv venv $VIRTUAL_ENV
 ENV PATH="$VIRTUAL_ENV/bin:$PATH"
 
-COPY . .
-
-RUN --mount=type=secret,id=MONGO_STRING \
-    --mount=type=secret,id=API_KEY \
-    --mount=type=secret,id=NEWS_API_KEY \
-    export MONGO_STRING=$(cat /run/secrets/MONGO_STRING) && \
-    export NEWS_API_KEY=$(cat /run/secrets/NEWS_API_KEY) && \
-    export API_KEY=$(cat /run/secrets/API_KEY)
+COPY requirements.txt .
+RUN uv pip install --no-cache -r requirements.txt
 
-RUN uv pip install --no-cache --system -r /code/requirements.txt
+COPY . .
 
 ENV PORT=7860
 EXPOSE $PORT