Adding gitea build scripts for Android, Linux GUI and dockerized website

ac_web/nginx.conf

@@ -0,0 +1,24 @@
+# Nginx configuration for the static Flutter web bundle.
+server {
+    listen 80;
+    server_name _;
+
+    root /usr/share/nginx/html;
+    index index.html;
+
+    # Everything the bundle cannot resolve itself is answered with the app, so
+    # that reloading a deep link does not end in a 404.
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+
+    # Both files decide which version of the app the browser gets. They must
+    # never be cached, otherwise a new deployment is not picked up.
+    location = /index.html {
+        add_header Cache-Control "no-store";
+    }
+
+    location = /flutter_service_worker.js {
+        add_header Cache-Control "no-store";
+    }
+}