chore: add .env example

Author: volt1c

.env.example

@@ -0,0 +1,15 @@
+# Host Config
+HOST='0.0.0.0'
+PORT=3000
+ENV='development'
+DEBUG=True
+
+# Database Config
+SQLALCHEMY_DATABASE_URI_DEV='mysql://username:password@address/database_name'
+SQLALCHEMY_TRACK_MODIFICATIONS=False
+
+# Auth Config
+JWT_SECRET_KEY='some_jwt_secret_key'
+
+# Routes Config
+ROUTE_ADMIN_REGISTRATION=True