Fix Dockerfile.gpu to include required python3.8-tk
diff --git a/Dockerfile.gpu b/Dockerfile.gpu
index f940119f79..b18c58d447 100755
--- a/Dockerfile.gpu
+++ b/Dockerfile.gpu
@@ -7,6 +7,7 @@ RUN add-apt-repository ppa:deadsnakes/ppa -y
 RUN apt-get update
 RUN apt install python3.8 -y 
 RUN apt install python3.8-distutils -y
+RUN apt install python3.8-tk -y
 RUN apt install curl -y
 RUN curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
 RUN python3.8 get-pip.py
@@ -24,4 +25,4 @@ RUN jupyter serverextension enable --py jupyter_http_over_ws
 RUN alias python=python3.8
 RUN echo "alias python=python3.8" >> /root/.bashrc
 WORKDIR "/notebooks"
-CMD ["jupyter-notebook", "--allow-root" ,"--port=8888" ,"--no-browser" ,"--ip=0.0.0.0"]
\ No newline at end of file
+CMD ["jupyter-notebook", "--allow-root" ,"--port=8888" ,"--no-browser" ,"--ip=0.0.0.0"]
diff --git a/INSTALL.md b/INSTALL.md
index ef0836e05e..2a94d4f246 100755
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -233,7 +233,9 @@ INFO    1. Install Docker
             deepfakes-gpu
         
         1. Open a new terminal to interact with the project
-        docker exec faceswap-gpu python /srv/faceswap.py gui
+        docker exec -it deepfakes-gpu /bin/bash
+	# Launch deepfakes gui (Answer 3 for NVIDIA at the prompt)
+	python3.8 /srv/faceswap.py gui
 ```
 
 A successful setup log, without docker.

Also fixed incorrect instructions in INSTALL.md documentation for docker