Initial setup (first pass) (#1)

* Updated Elixir version; made phx interactive

* Added JS formatting rules

* Added yt-dlp to dockerfile

* Added a basic PR template

* Added default responses for the PR template

.prettierrc.js

@@ -0,0 +1,13 @@
+module.exports = {
+  printWidth: 100,
+  tabWidth: 2,
+  useTabs: false,
+  semi: false,
+  singleQuote: true,
+  jsxSingleQuote: false,
+  trailingComma: 'none',
+  bracketSpacing: true,
+  arrowParens: 'always',
+  requirePragma: false,
+  endOfLine: 'lf'
+}