remove unnecessary venv

Dockerfile

@@ -7,7 +7,6 @@ LABEL authors="tebarius"
 LABEL description="netdata-DocRudi"
 ENV PYTHONDONTWRITEBYTECODE=1
 ENV PYTHONUNBUFFERED=1
-ENV PATH="/rudi-venv/bin:$PATH"
 ENV SERVER_PORT=19998
 
 RUN apt-get update && \
@@ -21,8 +20,7 @@ WORKDIR /app
 COPY ./app /app/
 
 
-RUN python -m venv /rudi-venv \
-    && python -m pip install --upgrade pip \
+RUN python -m pip install --upgrade pip \
     && pip install --no-cache-dir -r requirements.txt \
     && useradd -m -u 1000 rudi \
     && chown -R rudi:rudi /app