Updated .gitignore for Firebase

.gitignore

@@ -2,11 +2,25 @@
 logs
 *.log
 npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+firebase-debug.log*
+
+# Firebase cache
+.firebase/
+
+# Firebase config
+
+# Uncomment this if you'd like others to create their own Firebase project.
+# For a team working on the same Firebase project(s), it is recommended to leave
+# it commented so all members can deploy to the same project(s) in .firebaserc.
+# .firebaserc
 
 # Runtime data
 pids
 *.pid
 *.seed
+*.pid.lock
 
 # Directory for instrumented libs generated by jscoverage/JSCover
 lib-cov
@@ -20,21 +34,32 @@ coverage
 # Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
 .grunt
 
+# Bower dependency directory (https://bower.io/)
+bower_components
+
 # node-waf configuration
 .lock-wscript
 
 # Compiled binary addons (http://nodejs.org/api/addons.html)
 build/Release
 
 # Dependency directories
-node_modules
-jspm_packages
+node_modules/
 
 # Optional npm cache directory
 .npm
 
+# Optional eslint cache
+.eslintcache
+
 # Optional REPL history
 .node_repl_history
 
-# Output
-output
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variables file
+.env