Update readme and expand error text #610

	name: Tests

	on: [push]

	env:
	CARGO_TERM_COLOR: always

	jobs:
	build:
	runs-on: ubuntu-latest
	services:
	postgres:
	image: postgres
	env:
	POSTGRES_USER: postgres_user
	POSTGRES_PASSWORD: test
	options: >-
	--health-cmd pg_isready
	--health-interval 10s
	--health-timeout 5s
	--health-retries 5
	ports:
	- 5432:5432
	steps:
	- uses: actions/checkout@v4
	- name: Cargo cache
	uses: actions/cache@v4
	with:
	path: \|
	~/.cargo/registry
	~/.cargo/git
	target
	key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
	- name: Build
	run: cargo build --verbose
	- name: Ensure fmt finds no changes
	run: cargo fmt --check
	- name: Ensure clippy finds no issues
	run: cargo clippy -- -D warnings
	- name: Install nsjail requirements
	run: sudo apt-get install -y libprotobuf-dev protobuf-compiler libnl-route-3-dev
	- name: Build nsjail
	run: scripts/build_nsjail.sh && mv nsjail tests/
	- name: Run tests
	run: cargo test --verbose

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