feat: Continuous Integration using GitHub actions

Jira: O2B-224

.github/workflows/backend.yml

@@ -0,0 +1,31 @@
+name: Backend
+
+on:
+  push:
+    paths:
+      - 'backend/**'
+      - 'spec/**'
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      matrix:
+        os: [windows-latest, ubuntu-latest]
+        node-version: [12.x]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+    - name: Installing dependencies
+      run: npm ci
+      working-directory: ./backend
+    - name: Executing test suite
+      run: npm test
+      working-directory: ./backend
+      env:
+        CI: true

.github/workflows/frontend.yml

@@ -0,0 +1,30 @@
+name: Frontend
+
+on:
+  push:
+    paths:
+      - 'frontend/**'
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      matrix:
+        os: [windows-latest, ubuntu-latest]
+        node-version: [12.x]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+    - name: Installing dependencies
+      run: npm ci
+      working-directory: ./frontend
+    - name: Executing test suite
+      run: npm test
+      working-directory: ./frontend
+      env:
+        CI: true

.github/workflows/openapi.yml

@@ -0,0 +1,26 @@
+name: OpenAPI
+
+on:
+  push:
+    paths:
+      - 'spec/**'
+
+jobs:
+  validate:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Check out head branch
+      uses: actions/checkout@v2
+      with:
+        path: head
+    - name: Check out master branch
+      uses: actions/checkout@v2
+      with:
+        ref: master
+        path: base
+    - name: Run OpenAPI Diff (from HEAD revision)
+      uses: mvegter/openapi-diff-action@v0.2.0
+      with:
+        head-spec: head/spec/openapi.yaml
+        base-spec: base/spec/openapi.yaml