A few potentially missing icons

[christopherpickering]

Thanks for this!

I have a few files missing icons, but I think some should be sharing icons that already exist:

• .coverage (new icon?) for https://coverage.readthedocs.io/en/6.4.1/
• .eslintignore > use a greyed version of eslint?
• .htmlhintrc > use the cogs?
• .jshintignore > use the cogs?
• .prettierignore > use the cogs?
• .prettierrc > use the cogs?
• .eslint.js > should use an eslint icon, not the js icon?
• .releaserc
• .styellintignore
• . (other dot files) > should default to cogs?
• *.sqlite > database icon?
• .python-version
• *.log > ?
• "nginx" nginx icon
• *.service > ?
• .html. > should use the html icon?