Add GitHub build & test action

.github/workflows/cmake.yml

@@ -0,0 +1,31 @@
+name: Build & Test
+
+on: [push]
+
+env:
+  BUILD_TYPE: Release
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Create Build Environment
+      run: cmake -E make_directory ${{github.workspace}}/build
+
+    - name: Configure CMake
+      shell: bash
+      working-directory: ${{github.workspace}}/build
+      run: cmake $GITHUB_WORKSPACE -DCMAKE_BUILD_TYPE=$BUILD_TYPE
+
+    - name: Build
+      working-directory: ${{github.workspace}}/build
+      shell: bash
+      run: cmake --build . --config $BUILD_TYPE
+
+    - name: Test
+      working-directory: ${{github.workspace}}/build
+      shell: bash
+      run: ./out/unittest

README.md

@@ -4,6 +4,8 @@ Very easy to use, procfs parsing library in C++.
 
 ## Build
 
+![Build & Test](https://github.com/dtrugman/pfs/actions/workflows/cmake.yml/badge.svg)
+
 Run `cmake . && make`
 
 Currently supported CMake configuration flags: