Updating the issue template

.github/ISSUE_TEMPLATE/bug_report.md

@@ -6,7 +6,21 @@ labels: ''
 assignees: ''
 
 ---
-
+**Before opening a new issue**
+Install the **staging** branch and check if the unexpected behavior is happening there as well.
+If you are on ArchLinux-based distro, you can install it through AUR (**bauh-staging**). Otherwise, you have
+to clone the repository and install it with pip:
+```
+git clone https://github.com/vinifmor/bauh.git -b staging --depth=1
+cd bauh
+python3 -m venv venv
+venv/bin/pip install pip --upgrade
+venv/bin/pip install setuptools --upgrade
+venv/bin/pip install -r requirements.txt
+venv/bin/pip install .
+venv/bin/bauh  # or venv/bin/bauh-tray
+```
+ 
 **Describe the bug**
 A clear and concise description of what the bug is.
 
@@ -14,4 +28,7 @@ A clear and concise description of what the bug is.
 bauh version: 
 O.S: name and version 
 Python version:
-bauh installation method: manual / package manager
+Installation method: pip | distro package manager (e.g: pacman)
+
+
+P.S: these instructions and the template must be respected, otherwise your issue will be closed.