Updated Codex installation instructions

INSTALL-CODEX-ECLIPSE.md

@@ -11,6 +11,22 @@ terminal (Konsole).
 - Node.js + npm (user-level install, no sudo)
 - Konsole (default KDE terminal)
 
+## npm installation with nvm
+
+    sudo apt install curl
+    curl -fsSL https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.7/install.sh | bash
+    source ~/.bashrc
+
+    nvm install --lts
+    nvm use --lts
+### Verify npm installation
+
+    which node
+    # should be ~/.nvm/versions/node/...
+
+    npm config get prefix
+    # should point inside ~/.nvm
+
 ## 1. Install Codex CLI (user-local)
 
 Do NOT use sudo.
@@ -67,11 +83,22 @@ Main tab:
 - Working Directory: Browse Workspace → select project root
 - Arguments:
 
-    --workdir "/absolute/path/to/your/project" -e bash -lc "./tools/run-codex.sh"
+    --workdir  ${project_loc} -e bash -lc "./tools/run-codex.sh"
 
 (Common tab: enable “Display in favorites menu → External Tools”.)
 
-Apply and Run.
+Apply and Run (the project where you plan to use Codex should be selected in the Project Explorer when you press Run).
+
+If ~/.bashrc was just modified and Eclipse is launched without restarting the KDE session, this Run will fail.
+The Eclipse Console will show <terminated>. You may run Eclipse from the terminal after
+
+    source ~/.bashrc
+    
+or just logout/login and restart Eclipse.
+To troubleshoot "<terminated>" problem you may modify Arguments in Eclipse launcher by adding "--hold":
+
+    --hold --workdir  ${project_loc} -e bash -lc "./tools/run-codex.sh"
+    
 
 A Konsole window should open and display the Codex UI.