Use Alpine Linux on CI

Makefile

 alpine-static-ci:
 	docker build -t dds-builder -f tools/Dockerfile.alpine tools/
 	docker run \
-		-ti --rm \
+		-t --rm \
 		-u $(shell id -u) \
 		-v $(PWD):/host -w /host \
 		--privileged \

azure-pipelines.yml

         pool:
           vmImage: ubuntu-18.04
         steps:
-          - script: sudo apt-get -y update
-            displayName: APT Update
-          - script: sudo apt-get -y install g++-9 ccache
-            displayName: Get GCC 9
-          - script: sudo apt-get -y install python3-minimal python3-setuptools
-            displayName: Get Python 3
-          - script: python3 -m pip install pytest pytest-xdist
-            displayName: Get Python Dependencies
-          - script: make linux-ci
+          - script: make alpine-static-ci
             displayName: Build and Test
           - publish: _build/dds-linux-x64
             displayName: Publish