Fix docker build

Dockerfile

@@ -1,9 +1,9 @@
-FROM alpine AS builder
+FROM alpine:edge AS builder
 
 COPY . /go/src/matterbridge
 RUN apk --no-cache add go git \
         && cd /go/src/matterbridge \
-        && go build -mod vendor -ldflags "-X main.githash=$(git log --pretty=format:'%h' -n 1)" -o /bin/matterbridge
+        && CGO_ENABLED=0 go build -mod vendor -ldflags "-X main.githash=$(git log --pretty=format:'%h' -n 1)" -o /bin/matterbridge
 
 FROM alpine
 RUN apk --no-cache add ca-certificates mailcap

matterbridge.go

@@ -16,7 +16,7 @@ import (
 )
 
 var (
-	version = "1.22.4-dev"
+	version = "1.23.0-dev"
 	githash string
 
 	flagConfig  = flag.String("conf", "matterbridge.toml", "config file")