Add CPU and memory limits for apps

Adds --memory and --cpu flags to set systemd resource limits:
  ship --binary ./app --memory 512M --cpu 100%

Also adds config update mode - use --name without --binary to
update an existing app's config without redeploying the binary:
  ship --name myapp --cpu 50%
  ship --name myapp --memory 256M --env DEBUG=true

Limits are stored in state and preserved on redeploy.

1 files changed, 6 insertions, 0 deletions

diff --git a/internal/templates/templates.go b/internal/templates/templates.go
index feb6c10..ce1cbe5 100644
--- a/internal/templates/templates.go
+++ b/internal/templates/templates.go
@@ -19,6 +19,12 @@ Restart=always
 RestartSec=5s
 NoNewPrivileges=true
 PrivateTmp=true
+{{- if .Memory}}
+MemoryMax={{.Memory}}
+{{- end}}
+{{- if .CPU}}
+CPUQuota={{.CPU}}
+{{- end}}
 
 [Install]
 WantedBy=multi-user.target