Fix @NickBolles restart feature building and Alpine bin compilation flag

Makefile

@@ -17,7 +17,7 @@ dist-clean:
 	rm -f docker-gen-darwin-*.tar.gz
 
 dist: dist-clean
-	mkdir -p dist/alpine-linux/amd64 && GOOS=linux GOARCH=amd64 go build -ldflags "$(LDFLAGS)" -a -tags netgo -installsuffix netgo -o dist/alpine-linux/amd64/docker-gen ./cmd/docker-gen
+	mkdir -p dist/alpine-linux/amd64 && GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -ldflags "$(LDFLAGS)" -a -tags netgo -installsuffix netgo -o dist/alpine-linux/amd64/docker-gen ./cmd/docker-gen
 	mkdir -p dist/alpine-linux/arm64 && GOOS=linux GOARCH=arm64 go build -ldflags "$(LDFLAGS)" -a -tags netgo -installsuffix netgo -o dist/alpine-linux/arm64/docker-gen ./cmd/docker-gen
 	mkdir -p dist/alpine-linux/armhf && GOOS=linux GOARCH=arm GOARM=6 go build -ldflags "$(LDFLAGS)" -a -tags netgo -installsuffix netgo -o dist/alpine-linux/armhf/docker-gen ./cmd/docker-gen
 	mkdir -p dist/linux/amd64 && GOOS=linux GOARCH=amd64 go build -ldflags "$(LDFLAGS)" -o dist/linux/amd64/docker-gen ./cmd/docker-gen

cmd/docker-gen/main.go

@@ -10,6 +10,7 @@ import (
 
 	"github.com/BurntSushi/toml"
 	docker "github.com/fsouza/go-dockerclient"
+    "github.com/jwilder/docker-gen"
 )
 
 type stringslice []string

config.go

@@ -5,7 +5,6 @@ import (
 	"strings"
 	"time"
 
-	"github.com/fsouza/go-dockerclient"
 )
 
 type Config struct {
@@ -15,7 +14,7 @@ type Config struct {
 	Wait             *Wait
 	NotifyCmd        string
 	NotifyOutput     bool
-	NotifyContainers map[string]docker.Signal
+	NotifyContainers map[string]int
 	OnlyExposed      bool
 	OnlyPublished    bool
 	IncludeStopped   bool