functional (I think) lgo kernel

lgo version of Go kernel for Jupyter is working in tests
but hasn't been stressed very heavily
Also, dockerfile was tweaked to do yum update in the
second stage again, increasing size, but possibly making
things better somehow

Dockerfile

@@ -133,13 +133,14 @@ ENV CONDA_DIR=/opt/conda \
     LANGUAGE=en_US.UTF-8
 ENV PATH=$CONDA_DIR/bin:$PATH \
     HOME=/home/$NB_USER \
-    JUPYTER=/opt/conda/bin/jupyter
-
+    JUPYTER=/opt/conda/bin/jupyter 
+ENV GOPATH=$HOME/.local/share/go \
+    LGOPATH=$HOME/.local/share/lgo
 
 # second stage install packages and cleanup
 USER root
-# RUN yum -y update \
-RUN yum -y install \
+RUN yum -y update \
+    && yum -y install \
         sudo \
         gcc \
         epel-release \

kernels/go/kernel.json

@@ -1,6 +1,7 @@
 {
     "argv":["/opt/conda/share/jupyter/kernels/installers/dynamic_lgo", 
-            "--connection_file={connection_file}",
+            "kernel",
+            "--connection_file={connection_file}"],
     "display_name":"Go (lgo)",
     "language":"go"
 }

kernels/installers/dynamic_lgo

@@ -1,10 +1,10 @@
 #!/usr/bin/env bash
 
-EXECUTABLE=$HOME/.local/share/lgo
+EXECUTABLE=$HOME/.local/share/go/bin/lgo
 
 if [ ! -e "$EXECUTABLE" ]; then
     echo "Installing the lgo kernel for the Go language..."
-    sudo yum install zeromq-devel
+    sudo yum -y update && sudo yum install -y zeromq-devel
     conda install -y -c conda-forge git go
     export GOPATH=$HOME/.local/share/go
     go get github.com/yunabe/lgo/cmd/lgo && go get -d github.com/yunabe/lgo/cmd/lgo-internal