add simple linting script

Signed-off-by: Victor Seiji Hariki <victorseijih@gmail.com>

.gitignore

@@ -1 +1,9 @@
 .vscode/*
+
+# NPM things
+package.json
+package-lock.json
+node_modules/
+
+# Yarn things
+yarn.lock

lint.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/bash
+
+if ! which npx 2>&1 > /dev/null; then
+    echo "[lint] npm/npx is not installed"
+    exit 1
+fi
+
+npx prettier > /dev/null || npm install prettier && echo "[lint] We have 'prettier'"
+npx eslint > /dev/null || npm install eslint && echo "[lint] We have 'eslint'"
+npx prettier-eslint > /dev/null || npm install prettier-eslint-cli && echo "[lint] We have 'prettier-eslint'"
+
+echo "[lint] Linting JavaScript files..."
+npx prettier-eslint --write "**/*.js"
+echo "[lint] Linting HTML files..."
+npx prettier-eslint --write "**/*.html"
+echo "[lint] Linting CSS files..."
+npx prettier-eslint --write "**/*.css"
+echo "[lint] Linting MarkDown files"
+npx prettier-eslint --write "**/*.md"
+
+echo "[lint] Finished Linting."