Unset unused variables

apptainer/files/moose-dev/opt/code-server/bin/code-server-start

@@ -16,15 +16,18 @@
 set -e
 
 # The port to run on, auto set to 8080
-CODE_SERVER_PORT=${CODE_SERVER_PORT:-8080}
+PORT=${CODE_SERVER_PORT:-8080}
+unset CODE_SERVER_PORT
 
 # The password to connect with, if one is not provided (randomly generated)
+PASSWORD=
 if [ -z "$CODE_SERVER_PASSWORD" ]; then
-  export PASSWORD=$(tr -dc A-Za-z0-9 </dev/urandom | head -c 24)
+  PASSWORD="$(tr -dc A-Za-z0-9 </dev/urandom | head -c 24)"
 # Password was provided, so don't show it
 else
-  export PASSWORD="${CODE_SERVER_PASSWORD}"
+  PASSWORD="${CODE_SERVER_PASSWORD}"
 fi
+export PASSWORD
 
 # Create the dataroot if it doesn't exist + the extensions
 if [ -n "$CODE_SERVER_DATAROOT" ]; then
@@ -41,27 +44,32 @@ fi
 # Install the extensions, unless requested not to
 if [ -z "$CODE_SERVER_SKIP_EXTENSIONS" ]; then
   /opt/code-server/bin/code-server-setup-extensions "${CODE_SERVER_ARGS[@]}"
+else
+  unset CODE_SERVER_SKIP_EXTENSIONS
 fi
 
 # Pass the dataroot if its set
 if [ -n "$CODE_SERVER_DATAROOT" ]; then
   CODE_SERVER_ARGS+=("--user-data-dir=${CODE_SERVER_DATAROOT}")
 fi
+unset CODE_SERVER_DATAROOT
 
 # Expose the password to the user if we set it
 if [ -z "$CODE_SERVER_PASSWORD" ]; then
   GREEN='\033[0;32m'
   NC='\033[0m'
-  printf "${GREEN}Connect to the instance at http://localhost:${CODE_SERVER_PORT} with password ${PASSWORD}${NC}\n"
+  printf "${GREEN}Connect to the instance at http://localhost:${PORT} with password ${PASSWORD}${NC}\n"
+else
+  unset CODE_SERVER_PASSWORD
 fi
 
 if [ -n "$UNSET_APPTAINER_VARS" ]; then
-  unset "${!APPTAINER@}" "${!SINGULARITY@}"
+  unset "${!APPTAINER@}" "${!SINGULARITY@}" UNSET_APPTAINER_VARS
 fi
 
 # Run the server
 code-server --auth=password \
-            --bind-addr=0.0.0.0:"${CODE_SERVER_PORT}" \
+            --bind-addr=0.0.0.0:"${PORT}" \
             --disable-telemetry \
             --disable-getting-started-override \
             --disable-update-check \