test: Replace http server for recipes with nginx container

tests/fixtures/nginx.conf

@@ -0,0 +1,24 @@
+events {
+    worker_connections 1024;
+}
+
+http {
+    include /etc/nginx/mime.types;
+    default_type text/html;
+
+    server {
+        listen 80;
+        server_name _;
+
+        location / {
+            root /usr/share/nginx/html;
+            try_files $uri $uri.html =404;
+        }
+
+        # Serve test_recipe.html at /black-pepper-tofu
+        location = /black-pepper-tofu {
+            root /usr/share/nginx/html;
+            try_files /test_recipe.html =404;
+        }
+    }
+}