[Python] Cloud Run installs JS Modules every call

I have a cloud run function in python, and some JS files. The python code calls the JS code via processes. For some reason every time I call the cloud run function it seems to install jsdom which slows it down by 8 seconds. I tried using a docker ignore file to ignore my node_modules folder but that didnt work. My Python/JS code does not manually install it. Why does it get installed every time? Shouldn't these node modules already be installed in the image? I do have autoscale down to zero by the way.



Docker File

FROM python:3.11-slim

# Install Node.js 18
RUN apt-get update && \
apt-get install -y curl gnupg build-essential && \
curl -fsSL https://deb.nodesource.com/setup_18.x | bash - && \
apt-get install -y nodejs && \
apt-get clean && \
rm -rf /var/lib/apt/lists/*

# Set environment
ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1
WORKDIR /app

# Copy requirements and install
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Copy Node.js package files and install Node packages
COPY package*.json ./
RUN npm install

# Copy all project files
COPY . .

# Set Flask environment variables
ENV PORT 8080
ENV GOOGLE_APPLICATION_CREDENTIALS /app/service-account.json

# Expose port
EXPOSE 8080

# Start the Flask app
CMD ["python", "main.py"]


Requirements.txt

google-cloud-firestore
jsbeautifier
javascript
requests
colorama
esprima
flask
httpx


package.json

{
"name": "firebasekeyparser",
"version": "1.0.0",
"description": "**To use:**",
"main": "blob.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"keywords": [],
"author": "",
"license": "ISC",
"dependencies": {
"@babel/generator": "^7.27.0",
"@babel/parser": "^7.27.0",
"@babel/traverse": "^7.27.0",
"axios": "^1.9.0",
"canvas": "^3.1.0",
"jsdom": "^26.1.0"
}
}


code.mjs

const axios = require('axios');
const jsdom = require('jsdom');
const { JSDOM } = jsdom;
const parser = require('@babel/parser');
const traverse = require('@babel/traverse').default;
const generate = require('@babel/generator').default;

...


Commands to deploy

gcloud builds submit --tag gcr.io/<project id>/firebase-key-parser

gcloud run deploy firebase-key-parser \
--image=gcr.io/<project id>/firebase-key-parser \
--platform=managed \
--region=us-central1 \
--allow-unauthenticated

Continue reading...