add CI

.github/workflows/ci.yml

@@ -0,0 +1,31 @@
+name: Test
+
+on:
+  push:
+  pull_request:
+  release:
+    types: [published]
+  check_suite:
+    types: [rerequested]
+
+jobs:
+  build:
+    runs-on: ubuntu-18.04
+    container: debian:buster
+
+    steps:
+    - name: install dependencies
+      run: |
+        apt-get update
+        apt-get --no-install-recommends -y install admesh git imagemagick jekyll make openscad python3 python3-yaml xauth xvfb python3-pip python3-setuptools
+        python3 -mpip install cookiecutter
+    - name: git setup
+      run: |
+        git config --global user.name "${GITHUB_ACTOR}"
+        git config --global user.email "${GITHUB_ACTOR}@users.noreply.github.com"
+    - name: checkout
+      uses: actions/checkout@v2
+    - name: cut a cookie
+      run: cookiecutter --no-input .
+    - name: build within the cookie
+      run: xvfb-run make V=2 -O -j$(nproc) -C mystl jekyll