setup instructions

README.md

@@ -4,4 +4,40 @@ Rust based hottub server
 
 the following URL: 
 
-[hottub.spacemoehre.de](hottub://source?url=hottub.spacemoehre.de)
+[hottub.spacemoehre.de](hottub://source?url=hottub.spacemoehre.de)
+
+## build it yourself
+
+Get, Build and Host the docker image:
+
+```
+git clone https://gitea.spacemoehre.de/simon/hottub
+sudo docker build hottub
+sudo docker compose up -d
+```
+
+Verify setup, replace the url with your setup url
+
+```
+curl -v http://127.0.0.1
+```
+
+->
+
+```
+*   Trying 127.0.0.1:80...
+* Connected to 127.0.0.1 (127.0.0.1) port 80
+> GET / HTTP/1.1
+> Host: 127.0.0.1:80
+> User-Agent: curl/8.5.0
+> Accept: */*
+> 
+< HTTP/1.1 302 Found
+< content-length: 0
+< location: hottub://source?url=127.0.0.1:80
+< date: Mon, 29 Sep 2025 14:58:15 GMT
+< 
+* Connection #0 to host 127.0.0.1 left intact
+```
+
+make sure that you get a code 302 to a `hottub://` url