Update README.md

README.md

@@ -39,6 +39,22 @@ python3 -m venv wikstraktorenv #create wikstraktorenv environment
 pip install -r server_requirements.txt
 ```
 
+### Specific user
+you can install it for a specific, without an environment (even if it is not recommended)
+```bash
+pip install -r requirements.txt
+```
+
+if you are an administrator you can install it for some other user…
+```bash
+sudo -H -u otherUser pip install -r requirements.txt
+```
+NB : it is better if that user also cloned the repo, otherwise dubious ownership might arise and that use should have the following lines in **their** `.gitconfig`
+```
+[safe]
+	directory = /path/to/wikstraktor
+```
+
 ## Use
 ### Wikstraktor
 #### Python