Add GitHub Actions

.github/workflows/main.yaml

@@ -0,0 +1,24 @@
+---
+name: Compile Doomfire
+on:
+  push:
+    tags:
+      - v*
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v4
+      - name: Set up Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: '1.21'
+      - name: Compile
+        run: make wasm
+      - name: Upload Artefact
+        uses: softprops/action-gh-release@v1
+        if: startsWith(github.ref, 'refs/tags/')
+        with:
+          files: |
+            html/main.wasm