a few additions to static served pages

.gitignore

public/code_jam/index.html

public/coding_challenges/collisions/index.html

public/coding_challenges/collisions/quad-tree/index.html

public/coding_challenges/collisions/quad-tree/qtree.js

public/coding_challenges/collisions/quad-tree/sketch.js

.../coding_challenges/collisions/test-every-optim/index.html

...hallenges/collisions/test-every-optim/test-every-optim.js

public/coding_challenges/collisions/test-every/index.html

public/coding_challenges/collisions/test-every/test-every.js

public/coding_challenges/covid-tracker/cases.csv

public/coding_challenges/covid-tracker/index.html

public/coding_challenges/covid-tracker/index.js

public/coding_challenges/index.html

public/errors/500.html

public/index.html

public/sitemap.xml