exchange nvm with fnm in bash environment

.bashrc

@@ -185,10 +185,9 @@ if [[ -x "$(command -v rustup)" ]]; then
   . <(rustup completions bash)
 fi
 
-export NVM_SYMLINK_CURRENT=true
-export NVM_DIR="$HOME/.nvm"
-[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"  # This loads nvm
-[ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion"  # This loads nvm bash_completion
+if [[ -x "$(command -v fnm)" ]]; then
+  eval "$(fnm env --use-on-cd)"
+fi
 
 # Fuzzy search
 source /usr/share/doc/fzf/examples/key-bindings.bash