docs: Added 'how to debug' page

docs/howto/localdebug.md

@@ -0,0 +1,47 @@
+## Debug with VSCode
+
+1. Install **debugpy** module
+
+    `pip install debugpy`
+    
+2. Add to your code listening to the default `5678` port with debug adapter
+
+    ```python
+    import debugpy
+    debugpy.listen(5678, in_process_debug_adapter=True)
+    ```
+    
+3. Launch your G2O Server
+
+4. In VSCode, go to your Python script, press **F5** and select **Attach using Process ID**
+
+    ![Screenshot](https://picloud.cc/images/97bf2c4c7821af4b32b7906ba5dbee2f.png)
+    
+5. Find G2O Server process and select it
+    
+    ![Screenshot](https://picloud.cc/images/e438291ae8fe213fb6a4ff7ea57821f0.png)
+    
+![Screenshot](https://picloud.cc/images/70621be4531719d40606dce7fec7a49b.png)
+
+!!! warning
+    Sometimes **debugpy** isn't terminating process even after server is closed. Keep an eye on process list while attaching, so you can terminate them manually.
+    
+## Debug with PDB
+
+Python Debugger (PDB) is already implemented by default, so you can place breakpoints right away
+
+```python
+@g2o.event('onTime')
+def evtTime(**kwargs):
+    a = 5
+    b = 246
+    c = a * b
+    
+    breakpoint()
+    
+    print(kwargs)
+```
+
+That way PDB interface will show up on breakpoint encounter, and you can use it [as usual](https://docs.python.org/3/library/pdb.html)
+
+![Screenshot](https://picloud.cc/images/982c6932a818efb657406a9f4041067a.png)