Relocate reverse-proxy example configurations and update docs/configuring-playbook-own-webserver.md with more details

examples/reverse-proxies/caddy2/Caddyfile

@@ -0,0 +1,40 @@
+matrix.example.tld {
+
+  handle {
+        encode zstd gzip
+
+        reverse_proxy localhost:81  {
+               header_up X-Forwarded-Port {http.request.port}
+               header_up X-Forwarded-TlsProto {tls_protocol}
+               header_up X-Forwarded-TlsCipher {tls_cipher}
+               header_up X-Forwarded-HttpsProto {proto}
+        }
+  }
+}
+
+matrix.example.tld:8448 {
+    handle {
+        encode zstd gzip
+
+        reverse_proxy 127.0.0.1:8449 {
+               header_up X-Forwarded-Port {http.request.port}
+               header_up X-Forwarded-TlsProto {tls_protocol}
+               header_up X-Forwarded-TlsCipher {tls_cipher}
+               header_up X-Forwarded-HttpsProto {proto}
+        }
+    }
+}
+
+
+example.tld {
+# Uncomment this if you are following "(Option 3): Setting up reverse-proxying of the well-known files from the base domain's server to the Matrix server" of https://github.com/spantaleev/matrix-docker-ansible-deploy/blob/master/docs/configuring-well-known.md#option-3-setting-up-reverse-proxying-of-the-well-known-files-from-the-base-domains-server-to-the-matrix-server
+    @wellknown {
+        path /.well-known/matrix/*
+    }
+
+    handle @wellknown {
+        reverse_proxy https://matrix.example.tld {
+            header_up Host {http.reverse_proxy.upstream.hostport}
+        }
+    }
+}