Set HTTP 'Content-Type' header for Prometheus response #3564

	name: electrs

	on:
	push:
	pull_request:
	schedule:
	- cron: "0 0 * * *" # once a day

	jobs:
	build:
	name: Build

	runs-on: ${{ matrix.os }}

	strategy:
	matrix:
	os: [ubuntu-latest, windows-latest]
	build-args:
	[
	--locked --no-default-features,
	--locked
	]
	include:
	- os: ubuntu-latest
	build-args: --locked --features metrics_process

	steps:
	- uses: actions/checkout@v3
	- uses: dtolnay/rust-toolchain@stable
	with:
	components: rustfmt, clippy

	- name: Install Rust
	run: rustup component add rustfmt clippy

	- name: Format
	run: cargo fmt --all -- --check

	- name: Build
	run: cargo build ${{ matrix.build-args }} --all

	- name: Test
	run: cargo test ${{ matrix.build-args }} --all

	- name: Clippy
	run: cargo clippy -- -D warnings

	integration:
	name: Integration
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v3
	- name: Build
	run: docker build -f Dockerfile.ci . --rm -t electrs:tests
	- name: Test
	run: docker run -v $PWD/contrib/:/contrib -v $PWD/tests/:/tests --rm electrs:tests bash /tests/run.sh

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