diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..eaf0146
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,9 @@
+FROM golang:1.20
+WORKDIR /src
+COPY . ./
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -v .
+
+FROM scratch
+COPY --from=0 /src/ts-docker-proxy ./
+ENV HOME=/
+CMD ["/ts-docker-proxy"]
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..c460302
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,74 @@
+module git.yetaga.in/alazyreader/ts-docker-proxy
+
+go 1.20
+
+require tailscale.com v1.44.0
+
+require (
+	filippo.io/edwards25519 v1.0.0 // indirect
+	github.com/Microsoft/go-winio v0.6.1 // indirect
+	github.com/akutz/memconn v0.1.0 // indirect
+	github.com/alexbrainman/sspi v0.0.0-20210105120005-909beea2cc74 // indirect
+	github.com/aws/aws-sdk-go-v2 v1.18.0 // indirect
+	github.com/aws/aws-sdk-go-v2/config v1.18.22 // indirect
+	github.com/aws/aws-sdk-go-v2/credentials v1.13.21 // indirect
+	github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.13.3 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/configsources v1.1.33 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.4.27 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/ini v1.3.34 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.9.27 // indirect
+	github.com/aws/aws-sdk-go-v2/service/ssm v1.36.3 // indirect
+	github.com/aws/aws-sdk-go-v2/service/sso v1.12.9 // indirect
+	github.com/aws/aws-sdk-go-v2/service/ssooidc v1.14.9 // indirect
+	github.com/aws/aws-sdk-go-v2/service/sts v1.18.10 // indirect
+	github.com/aws/smithy-go v1.13.5 // indirect
+	github.com/coreos/go-iptables v0.6.0 // indirect
+	github.com/fxamacker/cbor/v2 v2.4.0 // indirect
+	github.com/go-ole/go-ole v1.2.6 // indirect
+	github.com/godbus/dbus/v5 v5.1.0 // indirect
+	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
+	github.com/google/btree v1.1.2 // indirect
+	github.com/google/go-cmp v0.5.9 // indirect
+	github.com/hdevalence/ed25519consensus v0.1.0 // indirect
+	github.com/illarion/gonotify v1.0.1 // indirect
+	github.com/insomniacslk/dhcp v0.0.0-20230407062729-974c6f05fe16 // indirect
+	github.com/jmespath/go-jmespath v0.4.0 // indirect
+	github.com/josharian/native v1.1.1-0.20230202152459-5c7d0dd6ab86 // indirect
+	github.com/jsimonetti/rtnetlink v1.3.2 // indirect
+	github.com/klauspost/compress v1.16.5 // indirect
+	github.com/kortschak/wol v0.0.0-20200729010619-da482cc4850a // indirect
+	github.com/mdlayher/genetlink v1.3.2 // indirect
+	github.com/mdlayher/netlink v1.7.2 // indirect
+	github.com/mdlayher/sdnotify v1.0.0 // indirect
+	github.com/mdlayher/socket v0.4.1 // indirect
+	github.com/mitchellh/go-ps v1.0.0 // indirect
+	github.com/pierrec/lz4/v4 v4.1.17 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/tailscale/certstore v0.1.1-0.20220316223106-78d6e1c49d8d // indirect
+	github.com/tailscale/golang-x-crypto v0.0.0-20221115211329-17a3db2c30d2 // indirect
+	github.com/tailscale/goupnp v1.0.1-0.20210804011211-c64d0f06ea05 // indirect
+	github.com/tailscale/netlink v1.1.1-0.20211101221916-cabfb018fe85 // indirect
+	github.com/tailscale/wireguard-go v0.0.0-20230410165232-af172621b4dd // indirect
+	github.com/tcnksm/go-httpstat v0.2.0 // indirect
+	github.com/u-root/uio v0.0.0-20230305220412-3e8cd9d6bf63 // indirect
+	github.com/vishvananda/netlink v1.2.1-beta.2 // indirect
+	github.com/vishvananda/netns v0.0.4 // indirect
+	github.com/x448/float16 v0.8.4 // indirect
+	go4.org/mem v0.0.0-20220726221520-4f986261bf13 // indirect
+	go4.org/netipx v0.0.0-20230303233057-f1b76eb4bb35 // indirect
+	golang.org/x/crypto v0.8.0 // indirect
+	golang.org/x/exp v0.0.0-20230425010034-47ecfdc1ba53 // indirect
+	golang.org/x/mod v0.10.0 // indirect
+	golang.org/x/net v0.10.0 // indirect
+	golang.org/x/sync v0.2.0 // indirect
+	golang.org/x/sys v0.8.1-0.20230609144347-5059a07aa46a // indirect
+	golang.org/x/term v0.8.0 // indirect
+	golang.org/x/text v0.9.0 // indirect
+	golang.org/x/time v0.3.0 // indirect
+	golang.org/x/tools v0.9.1 // indirect
+	golang.zx2c4.com/wintun v0.0.0-20230126152724-0fa3db229ce2 // indirect
+	golang.zx2c4.com/wireguard/windows v0.5.3 // indirect
+	gvisor.dev/gvisor v0.0.0-20230504175454-7b0a1988a28f // indirect
+	inet.af/peercred v0.0.0-20210906144145-0893ea02156a // indirect
+	nhooyr.io/websocket v1.8.7 // indirect
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..b6a2961
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,228 @@
+filippo.io/edwards25519 v1.0.0 h1:0wAIcmJUqRdI8IJ/3eGi5/HwXZWPujYXXlkrQogz0Ek=
+filippo.io/edwards25519 v1.0.0/go.mod h1:N1IkdkCkiLB6tki+MYJoSx2JTY9NUlxZE7eHn5EwJns=
+filippo.io/mkcert v1.4.4 h1:8eVbbwfVlaqUM7OwuftKc2nuYOoTDQWqsoXmzoXZdbc=
+github.com/BurntSushi/toml v1.2.1 h1:9F2/+DoOYIOksmaJFPw1tGFy1eDnIJXg+UHjuD8lTak=
+github.com/Microsoft/go-winio v0.6.1 h1:9/kr64B9VUZrLm5YYwbGtUJnMgqWVOdUAXu6Migciow=
+github.com/Microsoft/go-winio v0.6.1/go.mod h1:LRdKpFKfdobln8UmuiYcKPot9D2v6svN5+sAH+4kjUM=
+github.com/akutz/memconn v0.1.0 h1:NawI0TORU4hcOMsMr11g7vwlCdkYeLKXBcxWu2W/P8A=
+github.com/akutz/memconn v0.1.0/go.mod h1:Jo8rI7m0NieZyLI5e2CDlRdRqRRB4S7Xp77ukDjH+Fw=
+github.com/alexbrainman/sspi v0.0.0-20210105120005-909beea2cc74 h1:Kk6a4nehpJ3UuJRqlA3JxYxBZEqCeOmATOvrbT4p9RA=
+github.com/alexbrainman/sspi v0.0.0-20210105120005-909beea2cc74/go.mod h1:cEWa1LVoE5KvSD9ONXsZrj0z6KqySlCCNKHlLzbqAt4=
+github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be h1:9AeTilPcZAjCFIImctFaOjnTIavg87rW78vTPkQqLI8=
+github.com/aws/aws-sdk-go-v2 v1.18.0 h1:882kkTpSFhdgYRKVZ/VCgf7sd0ru57p2JCxz4/oN5RY=
+github.com/aws/aws-sdk-go-v2 v1.18.0/go.mod h1:uzbQtefpm44goOPmdKyAlXSNcwlRgF3ePWVW6EtJvvw=
+github.com/aws/aws-sdk-go-v2/config v1.18.22 h1:7vkUEmjjv+giht4wIROqLs+49VWmiQMMHSduxmoNKLU=
+github.com/aws/aws-sdk-go-v2/config v1.18.22/go.mod h1:mN7Li1wxaPxSSy4Xkr6stFuinJGf3VZW3ZSNvO0q6sI=
+github.com/aws/aws-sdk-go-v2/credentials v1.13.21 h1:VRiXnPEaaPeGeoFcXvMZOB5K/yfIXOYE3q97Kgb0zbU=
+github.com/aws/aws-sdk-go-v2/credentials v1.13.21/go.mod h1:90Dk1lJoMyspa/EDUrldTxsPns0wn6+KpRKpdAWc0uA=
+github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.13.3 h1:jJPgroehGvjrde3XufFIJUZVK5A2L9a3KwSFgKy9n8w=
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+tailscale.com v1.44.0 h1:MPos9n30kJvdyfL52045gVFyNg93K+bwgDsr8gqKq2o=
+tailscale.com v1.44.0/go.mod h1:+iYwTdeHyVJuNDu42Zafwihq1Uqfh+pW7pRaY1GD328=
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..0757987
--- /dev/null
+++ b/main.go
@@ -0,0 +1,82 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"net/http"
+	"net/http/httputil"
+	"net/url"
+	"os"
+	"os/signal"
+	"strings"
+
+	"tailscale.com/tsnet"
+)
+
+type upstream struct {
+	hostname string
+	port     string
+}
+
+func must[T any](t T, err error) T {
+	if err != nil {
+		panic(err)
+	}
+	return t
+}
+
+func main() {
+	var servers []*http.Server
+
+	upstreamsConfig := os.Getenv("UPSTREAMS")
+	hosts := strings.Split(upstreamsConfig, ",")
+	if upstreamsConfig == "" || len(hosts) == 0 {
+		log.Fatalf("set UPSTREAMS in environment like 'dockerhost:7400,otherdocker:80'")
+	}
+
+	for _, upstream := range hosts {
+		hostname, port, ok := strings.Cut(upstream, ":")
+		if hostname == "" {
+			// parsing error, just skip it
+			continue
+		}
+		if !ok || port == "" {
+			// default to 80
+			port = "80"
+		}
+		s := &tsnet.Server{
+			Dir:      "/.config/" + hostname,
+			Hostname: hostname,
+		}
+		defer s.Close()
+
+		ln, err := s.Listen("tcp", ":80")
+		if err != nil {
+			fmt.Printf("%+v\n", err)
+			return
+		}
+		defer ln.Close()
+
+		srv := &http.Server{
+			Handler: httputil.NewSingleHostReverseProxy(
+				must(url.Parse("http://" + hostname + ":" + port + "/")),
+			),
+		}
+		servers = append(servers, srv)
+		// start server
+		go func() {
+			err = srv.Serve(ln)
+			fmt.Printf("%+v\n", err)
+		}()
+	}
+
+	sigint := make(chan os.Signal, 1)
+	signal.Notify(sigint, os.Interrupt)
+	<-sigint
+	for _, server := range servers {
+		if err := server.Shutdown(context.Background()); err != nil {
+			log.Printf("HTTP server Shutdown: %v", err)
+		}
+	}
+}