ci: add continuous build

.github/workflows/continuous.yml

@@ -0,0 +1,38 @@
+name: Build
+
+on:
+  push:
+    branches: ["main"]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: 1.22
+
+      - name: Test
+        run: go test -v ./...
+
+      - name: Build
+        run: go build -o steamgrid-proxy main.go
+
+      - uses: softprops/action-gh-release@v1
+        with:
+          token: "${{ secrets.GITHUB_TOKEN }}"
+          tag_name: "continuous"
+          prerelease: true
+          name: "Continuous Build"
+          files: |
+            steamgrid-proxy
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: steamgrid-proxy
+          path: |
+            steamgrid-proxy