fix: always ignore SIGPIPE (#1101)

frankenphp.go

@@ -34,10 +34,12 @@ import (
 	"io"
 	"net/http"
 	"os"
+	"os/signal"
 	"runtime"
 	"strconv"
 	"strings"
 	"sync"
+	"syscall"
 	"time"
 	"unsafe"
 
@@ -281,6 +283,10 @@ func Init(options ...Option) error {
 		return AlreaydStartedError
 	}
 
+	// Ignore all SIGPIPE signals to prevent weird issues with systemd: https://github.com/dunglas/frankenphp/issues/1020
+	// Docker/Moby has a similar hack: https://github.com/moby/moby/blob/d828b032a87606ae34267e349bf7f7ccb1f6495a/cmd/dockerd/docker.go#L87-L90
+	signal.Ignore(syscall.SIGPIPE)
+
 	opt := &opt{}
 	for _, o := range options {
 		if err := o(opt); err != nil {