add action to automatically build

.github/workflows/build.yaml

@@ -0,0 +1,26 @@
+name: build
+run-name: Build libcurl.js
+on: [push]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: download repo
+        uses: actions/checkout@v4
+      
+      - name: install deps
+        run: | 
+          sudo apt-get update
+          sudo apt-get install -y make cmake emscripten autoconf automake libtool pkg-config wget xxd
+      
+      - name: run build
+        working-directory: ./client
+        run: ./build.sh all
+
+      - name: upload img
+        uses: actions/upload-artifact@v4
+        with:
+          name: out
+          path: client/out/*
+          compression-level: 9