Updated readme, added npmignore

.npmignore

@@ -0,0 +1 @@
+package-lock.json

readme.md

@@ -1,6 +1,13 @@
+## Usage
+
+*Here is an example for `jg` (javascript grep):*
+```sh
+grep --color=always -rin "$@" --include "*.js" --include "*.mjs" --exclude "*.min.js" --exclude-dir node_modules | grep-mtime-sorter | ansi-trunc -l 250
+```
+
 ## Global Installation
 
-### HTTP
+### HTTPS
 
 ```sh
 sudo npm install -g 'git+https://gitea.efforting.tech/mikael-lovqvist/shell-utils.git#latest'
@@ -8,6 +15,10 @@ sudo npm install -g 'git+https://gitea.efforting.tech/mikael-lovqvist/shell-util
 
 ### SSH
 
+> [!CAUTION]
+> When you run `npm` as sudo, it will not use your users git configuration or identity. For now HTTPS is recommended instead.
+
+
 ```sh
 sudo npm install -g 'git+ssh://git.efforting.tech:mikael-lovqvist/shell-utils.git#latest'
 ```