Gcloud deploy is not deploying a folder - google-app-engine

Question

I am servicing a system.
An old App Engine tool was used to deploy, but it is now obsolete and I need to use the gcloud command line.
However, gcloud is ignoring one system folder and deploying all others.
One big reason this must be happening is because they developed this system based on node_modules and didn't build the code before uploading. In short, I need the node_modules folder for the code to execute.
I already disabled .gcloudignore, but there have been no changes.
Source folder structure:
Folder Structure in App Engine:
I ran the --verbosity = info code on my gcloud deploy and it appeared that they were ignoring it:
My app.yaml:
runtime: python27
api_version: 1
threadsafe: true
libraries:
- name: jinja2
version: 2.6
- name: lxml
version: 2.3
- name: pycrypto
version: 2.6
handlers:
- url: /static
static_dir: app/static
secure: always
- url: /.*
script: manage.app
secure: always
builtins:
- remote_api: on

Answer 1

By default, flask use a "templates" folder to contain all your template files(any plain-text file, but usually .html or some kind of template language such as jinja2 ) & a "static" folder to contain all your static files(i.e. .js .css and your images).
So ideally you should not use /static folder
you will need to update app.yaml to include handler static_dir: static
runtime: python27
api_version: 1
threadsafe: true
libraries:
- name: ssl
version: latest
# [START handlers]
handlers:
- url: /static
static_dir: static
- url: /.*
script: main.app
# [END handlers]
The best way to use is
from flask import Flask
app = Flask(__name__, static_folder='static', static_url_path='')