Add example docker compose files to the repository

docker/Caddyfile

@@ -0,0 +1,14 @@
+{$GEOFEEDDOMAIN}:443 {
+  log {
+    level INFO
+    output file {$LOG_FILE} {
+      roll_size 10MB
+      roll_keep 10
+    }
+  }
+
+  # Use the ACME HTTP-01 challenge to get a cert for the configured domain.
+  tls {$EMAIL}
+  
+  reverse_proxy geofeed:80
+}