Update docker.io/library/postgres Docker tag to v15

resources/chaosknoten/pad/nginx/pad.hamburg.ccc.de.conf

@@ -14,8 +14,6 @@ server {
 
     server_name pad.hamburg.ccc.de;
 
-    client_max_body_size 100m;
-
     ssl_certificate /etc/letsencrypt/live/pad.hamburg.ccc.de/fullchain.pem;
     ssl_certificate_key /etc/letsencrypt/live/pad.hamburg.ccc.de/privkey.pem;
     # verify chain of trust of OCSP response using Root CA and Intermediate certs