add entrypoint to gleam_build

.forgejo/workflows/publish.yml

···
         run: git clone --branch ${{ forge.ref_name }} ${{ forge.server_url }}/${{ forge.repository }}.git
 
       - name: Run gleam build
-        run: cd condition_overload && gleam run
+        run: cd condition_overload && gleam build
+
+      - name: Add entrypoint
+        run: |
+          echo "import { main } from "./condition_overload.mjs";\nmain();" > ./condition_overload/build/dev/javascript/condition_overload/gleam.main.mjs
 
       - name: Display build artifacts
         run: ls ./condition_overload/build/dev/javascript/