more eslint/prettier cleanup

.prettierrc.js

@@ -0,0 +1,10 @@
+// https://prettier.io/docs/en/options.html
+module.exports = {
+  singleQuote: false,
+  jsxSingleQuote: false,
+  printWidth: 120,
+  tabWidth: 2,
+  useTabs: false,
+  quoteProps: "as-needed",
+  trailingComma: "es5",
+};