Replace circleCI with github actions

.circleci/config.yml → .github/workflows/build.yml

@@ -1,31 +1,19 @@
-version: 2
+name: build
+
+on:
+  push:
+  pull_request:
 
 jobs:
   build:
-    docker:
-      - image: "ubuntu:20.04"
+    runs-on: ubuntu-latest
     steps:
-      - run: apt-get -qq update; apt-get -y install git
-      - checkout
-      - run:
-          name: Installing SUDO
-          command: |
-            apt-get update
-            apt-get install -y sudo
-            rm -rf /var/lib/apt/lists/*
-      - run:
-          name: Installing software-properties-common
-          command: |
-            sudo apt-get update
-            export DEBIAN_FRONTEND=noninteractive
-            apt-get install -y tzdata
-            sudo apt-get -y install software-properties-common
-      - run:
-          name: Install Python
-          command:  'sudo -E add-apt-repository -y ppa:deadsnakes/ppa && apt-get update && sudo apt-get -y install build-essential python3'
-      - run:
-          name: Install Python utilities
-          command: 'sudo apt-get install -y python3-dev python3-pip && python3 -m pip install pip --upgrade'
+      - name: Checkout repository
+        uses: actions/checkout@v2
+      - name: Setup Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: '3.x'
       - run:
           name: Installing GCC
           command: 'apt-get update && apt-get install -y gcc g++'