Provide nix build from source #972

	name: CI
	on:
	pull_request:
	jobs:
	nix-build:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: cachix/install-nix-action@v25
	- run: nix build
	ci-matrix:
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	java: [ '[email protected]' ]
	steps:
	- uses: actions/[email protected]
	with:
	fetch-depth: 100
	- uses: jorelali/setup-elm@v5
	with:
	elm-version: 0.19.1
	- uses: bahmutov/npm-install@v1
	with:
	working-directory: modules/webapp
	- name: Install tailwindcss cli
	run: \|
	curl -sSLo tailwindcss https://github.com/tailwindlabs/tailwindcss/releases/download/v3.4.1/tailwindcss-linux-x64
	chmod 755 tailwindcss
	mkdir -p bin
	mv tailwindcss bin/
	echo "PATH=$(pwd)/bin:$PATH" >> $GITHUB_ENV
	- name: Fetch tags
	run: git fetch --depth=100 origin +refs/tags/:refs/tags/
	- uses: olafurpg/setup-scala@v14
	with:
	java-version: ${{ matrix.java }}
	- name: Coursier cache
	uses: coursier/cache-action@v6
	- name: sbt ci ${{ github.ref }}
	run: sbt ci
	ci:
	runs-on: ubuntu-22.04
	needs: [ci-matrix, nix-build]
	steps:
	- name: Aggregate of lint, and all tests
	run: echo "ci passed"

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