Update Dockerfile

Dockerfile

@@ -1,8 +1,8 @@
 FROM python:3
 WORKDIR /usr/src/app
 COPY requirements.txt ./
-RUN python -m pip install --upgrade pip setuptools wheel
-RUN python -m pip install lbry-libtorrent
+RUN pip install --upgrade pip setuptools wheel
+RUN pip install lbry-libtorrent
 RUN apt-get install -y python3-libtorrent
 RUN pip install -r requirements.txt
 COPY . .