Update Dockerfile build config

Dockerfile

@@ -1,11 +1,12 @@
-FROM golang:1.22 AS build
+FROM golang:1.23 AS build
 
 WORKDIR /go/src/app
 COPY . .
 
 RUN go mod download
-RUN CGO_ENABLED=0 go build -o /go/bin/sshmux
+RUN CGO_ENABLED=0 go build -o /go/bin/sshmux -trimpath
 
 FROM gcr.io/distroless/static-debian12:nonroot
+COPY ./etc/config.example.toml /etc/config.example.toml 
 COPY --from=build /go/bin/sshmux /
 CMD ["/sshmux"]