Update base image from bullseye-slim to bookworm-slim

Author: BurritoWrapped

games/valheim/Dockerfile

@@ -4,7 +4,7 @@
 # ----------------------------------
 
 
-FROM debian:bullseye-slim
+FROM debian:bookworm-slim
 
 LABEL author="DevOps Team at Sparked Host" maintainer="devops@sparkedhost.com"
 
@@ -27,4 +27,4 @@ RUN  touch ${NSS_WRAPPER_PASSWD} ${NSS_WRAPPER_GROUP} \
 ADD  /valheim/passwd.template /passwd.template
 
 COPY  ./valheim/entrypoint.sh /entrypoint.sh
-CMD   [ "/bin/bash", "/entrypoint.sh" ]
+CMD   [ "/bin/bash", "/entrypoint.sh" ]