create build.yml workflow

.github/workflows/build.yml

@@ -0,0 +1,37 @@
+# This workflow will build a golang project
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-go
+
+name: Go
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+
+  build:
+    runs-on: ubuntu-latest
+        
+    steps:
+    - uses: actions/checkout@v4
+    
+    - run: sed -En 's/^go (.*)$/GO_VERSION=\1/p' go.mod >> $GITHUB_ENV
+    - name: Set up Go
+      uses: actions/setup-go@v4
+      with:
+          go-version: "${{ env.GO_VERSION }}"
+    
+    - name: Install dependencies
+      run: |
+        go get .
+
+    - name: Build project
+      run: go build ./...
+
+    - name: Upload executable
+      uses: actions/upload-artifact@v4
+      with:
+        name: ProxySwitcher Executable
+        path: ./ProxySwitcher.exe