add more folders to .npmignore

npm installations should not contain all the examples and python things

.npmignore

@@ -1,4 +1,3 @@
-/tests
 /node_modules
 /tmp
 /coverage
@@ -8,6 +7,20 @@ script.map
 .settings
 .ipynb
 
+CODE_OF_CONDUCT.md
+CONTRIBUTING.md
+doc.md
+echo.cgi
+examples/
+index.html
+learning-environment/
+paper/
+py3Dmol/
+tests/
+track/
+tutorials/
+/viewer.*
+
 #Ignoring Virtual Environments for the Active Learning Environment Project
 .env
 .venv