Add dependency info to README.md

README.md

@@ -1,3 +1,17 @@
 # Hackerspace Label Printing Interface
 
-Web interface for accessing label printers on the premises of Warsaw Hackerspace. Currently only supports DYMO LabelWriter.
+Web interface for accessing label printers on the premises of Warsaw Hackerspace. Currently only supports DYMO LabelWriter 450.
+
+## Dependencies
+
+This project relies on external dependencies:
+
+- `cairo`, `pango`, `pangocairo` for graphics manipulation
+- `CUPS` for interfacing with the printer over local network
+
+## Building and debugging 
+
+```
+poetry install
+poetry run python render.py
+```