Adds ansible playbook for foundry setup

Currently, running the playbook will:
- Install dependencies (Caddy, nodejs, unzip)
- Create a foundry user
- Extract foundry app into folder on server
- Update Caddyfile with reverse proxt config

TODO:
- unit file for foundry itself
- data directory

Caddyfile.j2

@@ -0,0 +1,3 @@
+{{ domain_name }}
+
+reverse_proxy localhost:30000