chore(gitignore,env): structure and add comments

.env.example

@@ -1,13 +1,17 @@
 HOST=127.0.0.1
 PORT=3333
 NODE_ENV=development
+APP_URL=http://${HOST}:${PORT}
+
 CACHE_VIEWS=false
-APP_KEY=
+
+APP_KEY=2wsjLSopTjD6WQEztTYIZgCFou8wpLJn
+
 DB_CONNECTION=sqlite
 DB_HOST=127.0.0.1
 DB_PORT=3306
 DB_USER=root
 DB_PASSWORD=
 DB_DATABASE=adonis
+
 SESSION_DRIVER=cookie
-APP_URL=http://${HOST}:${PORT}

.gitignore

@@ -1,5 +1,15 @@
+# Node modules
 node_modules
+
+# Adonis directory for storing tmp files
 tmp
+
+# Environment variables, never commit this file
 .env
+
+# Lock files
 package-lock.json
+yarn.lock
+
+# The development sqlite file
 database/development.sqlite