Add forgejo action

.forgejo/workflows/main.yml

@@ -0,0 +1,17 @@
+on:
+  push:
+    branches: ["main"]
+  workflow_dispatch:
+
+  jobs:
+    deploy:
+      runs-on: native
+      steps:
+        - name: Checkout
+          run: git clone --depth 1 ${{ gitea.server_url }}/${{ gitea.repository }} .
+        - name: Check
+          run: nix flake check
+        - name: Build
+          run: nix run .
+        - name: Deploy
+          run: cp -r public/. /var/www/jankremer.de/