diff --git a/server/go.mod b/server/go.mod
new file mode 100644
index 0000000..738d048
--- /dev/null
+++ b/server/go.mod
@@ -0,0 +1,8 @@
+module gitea.hijack.moe/huashui/a3web/server
+
+go 1.13
+
+require (
+	github.com/gin-contrib/static v0.0.0-20191128031702-f81c604d8ac2
+	github.com/gin-gonic/gin v1.5.0
+)
diff --git a/server/go.sum b/server/go.sum
new file mode 100644
index 0000000..5dc5f2e
--- /dev/null
+++ b/server/go.sum
@@ -0,0 +1,38 @@
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/elazarl/go-bindata-assetfs v1.0.0/go.mod h1:v+YaWX3bdea5J/mo8dSETolEo7R71Vk1u8bnjau5yw4=
+github.com/gin-contrib/sse v0.1.0 h1:Y/yl/+YNO8GZSjAhjMsSuLt29uWRFHdHYUb5lYOV9qE=
+github.com/gin-contrib/sse v0.1.0/go.mod h1:RHrZQHXnP2xjPF+u1gW/2HnVO7nvIa9PG3Gm+fLHvGI=
+github.com/gin-contrib/static v0.0.0-20191128031702-f81c604d8ac2 h1:xLG16iua01X7Gzms9045s2Y2niNpvSY/Zb1oBwgNYZY=
+github.com/gin-contrib/static v0.0.0-20191128031702-f81c604d8ac2/go.mod h1:VhW/Ch/3FhimwZb8Oj+qJmdMmoB8r7lmJ5auRjm50oQ=
+github.com/gin-gonic/gin v1.5.0 h1:fi+bqFAx/oLK54somfCtEZs9HeH1LHVoEPUgARpTqyc=
+github.com/gin-gonic/gin v1.5.0/go.mod h1:Nd6IXA8m5kNZdNEHMBd93KT+mdY3+bewLgRvmCsR2Do=
+github.com/go-playground/locales v0.12.1 h1:2FITxuFt/xuCNP1Acdhv62OzaCiviiE4kotfhkmOqEc=
+github.com/go-playground/locales v0.12.1/go.mod h1:IUMDtCfWo/w/mtMfIE/IG2K+Ey3ygWanZIBtBW0W2TM=
+github.com/go-playground/universal-translator v0.16.0 h1:X++omBR/4cE2MNg91AoC3rmGrCjJ8eAeUP/K/EKx4DM=
+github.com/go-playground/universal-translator v0.16.0/go.mod h1:1AnU7NaIRDWWzGEKwgtJRd2xk99HeFyHw3yid4rvQIY=
+github.com/golang/protobuf v1.3.2 h1:6nsPYzhq5kReh6QImI3k5qWzO4PEbvbIW2cwSfR/6xs=
+github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
+github.com/json-iterator/go v1.1.7/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
+github.com/leodido/go-urn v1.1.0 h1:Sm1gr51B1kKyfD2BlRcLSiEkffoG96g6TPv6eRoEiB8=
+github.com/leodido/go-urn v1.1.0/go.mod h1:+cyI34gQWZcE1eQU7NVgKkkzdXDQHr1dBMtdAPozLkw=
+github.com/mattn/go-isatty v0.0.9 h1:d5US/mDsogSGW37IV293h//ZFaeajb69h+EHFsv2xGg=
+github.com/mattn/go-isatty v0.0.9/go.mod h1:YNRxwqDuOph6SZLI9vUUz6OYw3QyUt7WiY2yME+cCiQ=
+github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
+github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
+github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
+github.com/ugorji/go v1.1.7 h1:/68gy2h+1mWMrwZFeD1kQialdSzAb432dtpeJ42ovdo=
+github.com/ugorji/go v1.1.7/go.mod h1:kZn38zHttfInRq0xu/PH0az30d+z6vm202qpg1oXVMw=
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+golang.org/x/sys v0.0.0-20190813064441-fde4db37ae7a/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/go-playground/assert.v1 v1.2.1/go.mod h1:9RXL0bg/zibRAgZUYszZSwO/z8Y/a8bDuhia5mkpMnE=
+gopkg.in/go-playground/validator.v9 v9.29.1 h1:SvGtYmN60a5CVKTOzMSyfzWDeZRxRuGvRQyEAKbw1xc=
+gopkg.in/go-playground/validator.v9 v9.29.1/go.mod h1:+c9/zcJMFNgbLvly1L1V+PpxWdVbfP1avr/N00E2vyQ=
+gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
diff --git a/server/main.go b/server/main.go
new file mode 100644
index 0000000..3de483c
--- /dev/null
+++ b/server/main.go
@@ -0,0 +1,94 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+	"sync"
+
+	"github.com/gin-contrib/static"
+	"github.com/gin-gonic/gin"
+)
+
+var (
+	unitsInfo      = make([]unitInfo, 0)
+	unitsInfoMutex = sync.RWMutex{}
+)
+
+type position []float64
+
+type unitInfo struct {
+	NetID       string   `json:"netid"`
+	IsPlayer    bool     `json:"isplayer"`
+	ProfileName string   `json:"profilename"`
+	Side        string   `json:"side"`
+	Position    position `json:"position"`
+}
+
+func (u *unitInfo) UnmarshalJSON(buf []byte) error {
+	tmp := []interface{}{
+		&u.NetID,
+		&u.IsPlayer,
+		&u.ProfileName,
+		&u.Side,
+		&u.Position,
+	}
+	wantLen := len(tmp)
+	if err := json.Unmarshal(buf, &tmp); err != nil {
+		return err
+	}
+	if g, e := len(tmp), wantLen; g != e {
+		return fmt.Errorf("wrong number of fields in Notification: %d != %d", g, e)
+	}
+	return nil
+}
+
+func main() {
+	listenAddress := os.Getenv("LISTEN_ADDR")
+	if listenAddress == "" {
+		listenAddress = ":5000"
+	}
+
+	router := gin.Default()
+	router.Use(static.Serve("/", static.LocalFile("../ui/public", false)))
+	router.Use(static.Serve("/maps", static.LocalFile("../maps", false)))
+
+	router.GET("/ping", func(c *gin.Context) {
+		c.String(http.StatusOK, "pong")
+	})
+
+	router.POST("/ping", func(c *gin.Context) {
+		c.JSON(http.StatusOK, gin.H{
+			"message": "pong",
+		})
+	})
+
+	router.POST("/units-info", updateUnitsInfo)
+	router.GET("/units-info", getUnitsInfo)
+
+	router.Run(listenAddress)
+}
+
+func updateUnitsInfo(c *gin.Context) {
+	ups := make([]unitInfo, 0)
+	err := c.ShouldBindJSON(&ups)
+	if err != nil {
+		log.Println(err)
+		c.JSON(http.StatusBadRequest, err)
+		return
+	}
+
+	unitsInfoMutex.Lock()
+	defer unitsInfoMutex.Unlock()
+	unitsInfo = ups
+
+	c.JSON(http.StatusOK, nil)
+}
+
+func getUnitsInfo(c *gin.Context) {
+	unitsInfoMutex.RLock()
+	defer unitsInfoMutex.RUnlock()
+	c.JSON(http.StatusOK, unitsInfo)
+}