add simple signaling-server implemented using libdatachannel cpp-api #806

	name: Build with Mbed TLS
	on:
	push:
	branches:
	- master
	pull_request:
	jobs:
	build-linux:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- name: Set up Homebrew
	uses: Homebrew/actions/setup-homebrew@master
	- name: Install Mbed TLS
	run: brew update && brew install mbedtls
	- name: submodules
	run: git submodule update --init --recursive --depth 1
	- name: cmake
	run: cmake -B build -DUSE_MBEDTLS=1 -DWARNINGS_AS_ERRORS=1 -DCMAKE_PREFIX_PATH=$(brew --prefix mbedtls)
	- name: make
	run: (cd build; make -j2)
	- name: test
	run: ./build/tests
	build-macos:
	runs-on: macos-latest
	steps:
	- uses: actions/checkout@v2
	- name: Install Mbed TLS
	run: brew update && brew install mbedtls
	- name: submodules
	run: git submodule update --init --recursive --depth 1
	- name: cmake
	run: cmake -B build -DUSE_MBEDTLS=1 -DWARNINGS_AS_ERRORS=1 -DENABLE_LOCAL_ADDRESS_TRANSLATION=1 -DCMAKE_PREFIX_PATH=$(brew --prefix mbedtls)
	- name: make
	run: (cd build; make -j2)
	- name: test
	run: ./build/tests

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