NOTES_DIR default

.zshrc will attempt to set the NOTES_DIR environment variable

First check to see if the environment variable is set.  If not,
if `$HOME/Sync/MarkdownNotes` exits, then use that.  If that directory
doesn't exist, try `$HOME/Documents`.  If they both fail, then don't set
the var.

.zshrc

@@ -1,7 +1,16 @@
 # Exports
 export PATH=$HOME/bin:/usr/local/bin:$HOME/.local/bin/:$PATH
 export ZSH="$HOME/.oh-my-zsh"
-
+# Export notes directory
+if [[ -z $NOTES_DIR ]]; then
+    if [[ -d $HOME/Sync/MarkdownNotes ]]; then
+        export NOTES_DIR=$HOME/Sync/MarkdownNotes
+    else
+    if [[ -d $HOME/Documents ]]; then
+        export NOTES_DIR=$HOME/Documents
+        fi
+    fi
+fi
 ZSH_THEME="powerlevel10k/powerlevel10k"
 POWERLEVEL9K_MODE="nerdfont-complete"
 plugins=(git zsh-autosuggestions zsh-syntax-highlighting)