feature: unit test via karma jasmine

* ChromeHeadlessCustom mode
* apt install chrome

.github/workflows/jasmine.yml

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+name: Karma Jasmine Tests
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  units:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v2
+
+    - name: Build Docker image
+      run: docker build -t jasmine -f ./docker-build/docker-actions/Dockerfile
+
+    - name: Run test
+      run: docker run jasmine

docker-build/docker-actions/Dockerfile

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+FROM node:16.17.1-buster
+
+# Install necessary dependencies
+RUN apt-get update \
+    && apt-get install -y wget gnupg \
+    && wget -q -O - https://dl.google.com/linux/linux_signing_key.pub | apt-key add - \
+    && echo "deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google-chrome.list \
+    && apt-get update \
+    && apt-get install -y google-chrome-stable \
+    && rm -rf /var/lib/apt/lists/*
+
+RUN mkdir /palladium-view
+WORKDIR /palladium-view
+COPY . /palladium-view
+
+RUN npm install
+
+CMD ["npm" "run" "ng" "test"]

karma.conf.js

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+const { Server } = require("karma");
+
+module.exports = function (config) {
+  config.set({
+    basePath: "",
+    frameworks: ["jasmine", "@angular-devkit/build-angular"],
+    plugins: [
+      require("karma-jasmine"),
+      require("karma-chrome-launcher"),
+      require("karma-jasmine-html-reporter"),
+      require("karma-coverage-istanbul-reporter"),
+      require("@angular-devkit/build-angular/plugins/karma"),
+    ],
+    client: {
+      clearContext: false, // leave Jasmine Spec Runner output visible in browser
+    },
+    coverageIstanbulReporter: {
+      dir: require("path").join(__dirname, "./coverage/palladium"),
+      reports: ["html", "lcovonly", "text-summary"],
+      fixWebpackSourcePaths: true,
+    },
+    reporters: ["progress", "kjhtml"],
+    port: 9876,
+    colors: true,
+    logLevel: config.LOG_INFO,
+    autoWatch: true,
+    browsers: ["Chrome"],
+    singleRun: true,
+    customLaunchers: {
+      ChromeHeadlessCustom: {
+        base: "ChromeHeadless",
+        flags: [
+          "--disable-gpu", // Disable hardware acceleration
+          "--no-sandbox", // Needed when running as root user in Docker
+          "--headless",
+          "--disable-dev-shm-usage", // Fixes issues with Docker memory limitations
+          "--disable-setuid-sandbox", // not recommended for security reasons but sometimes necessary
+        ],
+      },
+    },
+    browsers: ['ChromeHeadlessCustom'],
+    restartOnFileChange: true,
+    files: [
+      {
+        pattern: "src/**/*.spec.ts",
+        watched: true,
+        included: false,
+        served: false,
+      },
+    ],
+    httpsServerOptions: { // disable SSL certificate checks
+      key: '',
+      cert: '',
+      ca: '',
+      requestCert: false,
+      rejectUnauthorized: false
+    }
+  });
+};