Switch reverse-proxy to Caddy and let it handle the certs

Do this to simply the entire deployment.

docker_compose_applications/reverse-proxy/compose.yaml

@@ -1,12 +1,13 @@
 # Links & Resources
-# - https://hub.docker.com/_/nginx
+# - https://hub.docker.com/_/caddy
+# - https://caddyserver.com/docs/
 
 services:
   caddy:
-    image: nginx
+    image: caddy
     ports:
       - "80:80"
       - "443:443"
     volumes:
-      - "./nginx.conf:/etc/nginx/nginx.conf:ro"
-      - "./conf.d/:/etc/nginx/conf.d/:ro"
+      - "./Caddyfile:/etc/caddy/Caddyfile:ro"
+      - "/ansible_docker_compose/project_data/reverse-proxy/caddy/data:/data"