Fix healthcheck

webmails/snappymail/Dockerfile

@@ -88,5 +88,5 @@ VOLUME ["/data"]
 
 CMD /start.py
 
-HEALTHCHECK CMD curl -f -L http://localhost/ || exit 1
+HEALTHCHECK CMD curl -f -L http://localhost/health || exit 1
 RUN echo $VERSION >> /version

webmails/snappymail/config/nginx-snappymail.conf

@@ -47,4 +47,9 @@ server {
     location ^~ /data {
       deny all;
     }
+
+    location /health {
+        add_header Content-Type text/plain;
+        return 200;
+    }
 }