Add Version entry to stats

Dockerfile

@@ -1,6 +1,7 @@
 FROM golang:1.18-bullseye
 
 COPY . /src/orbeat
+COPY .git/ /src/orbeat/.git/
 
 WORKDIR /src/orbeat
 RUN GOAMD64=v2 go build -v -o orbeat . && mv orbeat /usr/bin && rm -rf /src/orbeat

OrbitalBeat.go

@@ -23,6 +23,7 @@ import (
 	"os"
 	"path"
 	"runtime"
+	"runtime/debug"
 	"strings"
 	"sync"
 	"sync/atomic"
@@ -47,6 +48,8 @@ var trustedPublicKeys []ed25519.PublicKey
 
 var debugOutput = false
 
+var programVersion = "unknown"
+
 type statistics struct {
 	Served         servedStatistics         `json:"served"`
 	ContentCache   contentCacheStatistics   `json:"content_cache"`
@@ -550,12 +553,14 @@ func handle(ctx httputils.RequestContext) {
 			ctx.SetResponseCode(http.StatusOK)
 
 			statsStruct := struct {
+				Version    string      `json:"version"`
 				Statistics *statistics `json:"statistics"`
 				Database   struct {
 					TotalEntries uint64 `json:"entries"`
 					TotalSize    uint64 `json:"size"`
 				} `json:"database"`
 			}{
+				Version:    programVersion,
 				Statistics: &globalStatistics,
 			}
 
@@ -717,6 +722,16 @@ func main() {
 
 	var err error
 
+	if dInfo, ok := debug.ReadBuildInfo(); ok {
+		for _, s := range dInfo.Settings {
+			if s.Key == "vcs.revision" {
+				programVersion = s.Value
+			} else if s.Key == "vcs.modified" {
+				programVersion += "-dev"
+			}
+		}
+	}
+
 	for _, k := range strings.Split(*trustedKeys, ",") {
 		var publicKey ed25519.PublicKey
 		publicKey, err = MakyuuIchaival.Bech32Encoding.DecodeString(strings.Trim(k, " "))