Add git ignore file

Author: Stephen Miller

.gitignore

@@ -0,0 +1,30 @@
+# Node.js
+node_modules/
+npm-debug.log
+yarn-error.log
+
+# Logs
+logs
+*.log
+*.log.*
+
+# Dependency directories
+jspm_packages/
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# dotenv environment variables file
+.env
+
+# VS Code settings
+.vscode/