Move docker creation over to devenv

This is not ideal, since devenv is more for creating development
environments, but it works

hosting/nginx-http.conf

@@ -0,0 +1,13 @@
+server {
+    listen 8080;
+    server_name = fdroid.julian-mutter.de;
+
+    location = / {
+        return 302 /fdroid/repo;
+    }
+
+    location /fdroid/repo {
+        alias /repo/fdroid/repo/;
+        autoindex on;
+    }
+}