document possibility of installing ssg module with pip

docs/manual/developer/05_tools_and_utilities.md

@@ -9,6 +9,27 @@ this easier: `.pyenv.sh`. To set `PYTHONPATH` correctly for the current
 shell, simply call `source .pyenv.sh`. For more information on how to
 use this script, please see the comments at the top of the file.
 
+It is also possible to install the module with pip.
+Please note that this possibility was added after releasing the 0.1.75 version.
+To install the ssg module s it is currently present in the master branch, run the following command (possibly within a Python virtual environment):
+```bash
+pip install git+https://github.com/ComplianceasCode/content
+```
+
+It is also possible to install an ssg library version associated with a certain release.
+This is recommended because the library is not stable and it can change unexpectedly when installing from master.
+This is an example command which installs the library associated with the 0.1.76 release:
+
+```bash
+pip install git+https://github.com/ComplianceasCode/[email protected]
+```
+
+The installed package is named `ssg`.
+Please note that the name of the package will very probably change in the future.
+Therefore, if you install the module in this way, please pay close attention to release notes.
+It is worth emphasizing here that stability of the module is not guaranteed.
+Currently, it is used mainly for building the content and it is therefore modified predominantly based on needs of the content build system.
+
 ## Profile Statistics and Utilities
 
 The `profile_tool.py` tool displays XCCDF profile statistics. It can