How do I get my dockerized typescript node app working?

Question

Here is my Dockerfile :

# Download the slim version of node
FROM node:21-slim

# Set the work directory to app folder. 
# We will be copying our code here
WORKDIR /src

#Copy package.json file in the node folder inside container
COPY package.json .

# Copy the rest of the code in the container
COPY . .

# Install the dependencies in the container
RUN npm install

# Run the node server with server.js file
CMD ["npm", "start"]

# Expose the service over PORT 5000
EXPOSE 5000

Here is my package.json starting command :

"scripts": {
    "start": "nodemon -w src --ext ts --exec ts-node --esm src/app.ts"
  },

Here is my docker-compose.yml :

version: '3.8'

services:
  node_app:
    build: ./node
    container_name: node
    environment:
      - NODE_ENV=development
      - PORT=5000
    command: sh -c "npm start"
    volumes:
      - ./node:/home/node/app:cached
    ports:
      - '5000:5000'

And here is my file structure in vscode : file structure

And when I'm running docker inside this project with docker-compose build && docker-compose up -d, I'm getting the TypeError [ERR_UNKNOWN_FILE_EXTENSION]: Unknown file extension ".ts" for /src/src/app.ts error.

I'm sure I'm missing something around docker and app paths but I didn't managed to find what.