fix: format CI workflow and add pip caching step #3

	name: CI

	on:
	push:
	branches: ["master", "main"]
	pull_request:

	jobs:
	build:
	runs-on: ubuntu-latest

	steps:
	- name: Checkout code
	uses: actions/checkout@v4

	- name: Set up Python
	uses: actions/setup-python@v5
	with:
	python-version: "3.11"

	# 🔹 Cache pip downloads (speed boost)
	- name: Cache pip
	uses: actions/cache@v4
	with:
	path: ~/.cache/pip
	key: ${{ runner.os }}-pip-${{ hashFiles('requirements.txt') }}
	restore-keys: \|
	${{ runner.os }}-pip-

	- name: Install dependencies
	run: \|
	pip install -r requirements.txt

	- name: Run app import check
	run: \|
	python -c "import main"

	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v3

	- name: Build Docker image
	run: \|
	docker build -t fastapi-app .

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