chore: update go version to 1.22.5 and add new toolchain configuration

Dockerfile

@@ -1,10 +1,10 @@
 FROM golang:1.22.5 as builder
-WORKDIR /go/src/gitlab.com/unboundsoftware/dancefinder/geo-service
+WORKDIR /src
 COPY * ./
 RUN go get
 RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o geo-service .
 
 FROM scratch
 COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
-COPY --from=builder /go/src/gitlab.com/unboundsoftware/dancefinder/geo-service/geo-service /
+COPY --from=builder /src/geo-service /
 CMD ["/geo-service"]