Update gitignore

.gitignore

@@ -1,17 +1,12 @@
-!.gitignore
+output_files/*
+!output_files/.gitkeep
+draft_lca_api/
+__pycache__/
 **/venv/
 .idea/
-/development_tests/
-/data/energy_systems/heat_pumps/*.csv
-/data/energy_systems/heat_pumps/*.insel
-.DS_Store
-**/.env
-**/hub/logs/
-**/__pycache__/
-**/.idea/
-cerc_hub.egg-info
 
-ali_*.py
+*.geojson
-mreza_*.json
+input_files/*.geojson
-*_cap_3.json
+!input_files/.gitkeep
 
+itest_*.py