Add sysctl config options

[s4ke]

some relevant settings from moby slack:

net.ipv4.igmp_max_memberships = 80
# Performance tunning
kernel.shmall = 4097152
kernel.shmmax = 8147483648
kernel.shmmni = 8096
kernel.sem = 250        32000   100     128
fs.file-max = 65536
net.core.rmem_default = 1048576
net.core.rmem_max = 8388608
net.core.wmem_default = 262144
net.core.wmem_max = 8388608
net.core.netdev_max_backlog = 2500
net.ipv4.tcp_mem = 1048576 2097152 4194304
net.ipv4.tcp_rmem = 8192 65536 16777216
net.ipv4.tcp_wmem = 8192 87380 16777216
net.ipv4.ip_local_port_range = 1024 65000
# https://www.elastic.co/guide/en/elasticsearch/reference/current/docker.html#_set_vm_max_map_count_to_at_least_262144
vm.max_map_count=262144