chore: Add FOSSA check to GH actions

.github/workflows/main.yml

@@ -0,0 +1,71 @@
+# Copyright 2019 Communication Service/Software Laboratory, National Chiao Tung University (free5gc.org)
+#
+# SPDX-License-Identifier: Apache-2.0
+
+name: Main workflow
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Set up Go
+      uses: actions/setup-go@v2
+      with:
+        go-version: '1.14.4'
+
+    - name: Build
+      run: go build -v ./...
+
+    - name: Test
+      run: go test -v ./...
+
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-go@v5
+        with:
+          go-version-file: 'go.mod'
+
+      - name: Build
+        run: go build
+
+  license-check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: reuse lint
+        uses: fsfe/reuse-action@v2
+
+  fossa-check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: FOSSA scan
+        uses: fossa-contrib/fossa-action@v3
+        with:
+          fossa-api-key: 9dc8fa92e3dd565687317beb87b56d89
+
+  unit-tests:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-go@v5
+        with:
+          go-version-file: 'go.mod'
+
+      - name: Unit tests
+        run: go test ./...