Add GitHub workflows

.github/workflows/build-docker-image.yml

@@ -0,0 +1,15 @@
+name: Docker Image Build CI
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Build the Docker image
+      run: make docker-build

.github/workflows/go-test.yml

@@ -0,0 +1,25 @@
+name: Go Build and Test CI
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Set up Go
+      uses: actions/setup-go@v4
+      with:
+        go-version: 'stable'
+
+    - name: Build
+      run: make build
+
+    - name: Test
+      run: make test