2 Docker build issues with easy fix

Issue 1

 ---> Running in c019ea76f5d2
go: downloading github.com/mattn/go-runewidth v0.0.9
go: downloading github.com/nsf/termbox-go v0.0.0-20200418040025-38ba6e5628f1
go: finding golang.org/x/net v0.7.0
go: extracting github.com/mattn/go-runewidth v0.0.9
go: downloading golang.org/x/net v0.7.0
go: extracting github.com/nsf/termbox-go v0.0.0-20200418040025-38ba6e5628f1
go: extracting golang.org/x/net v0.7.0
go: downloading golang.org/x/sys v0.5.0
go: extracting golang.org/x/sys v0.5.0
go: finding github.com/mattn/go-runewidth v0.0.9
go: finding github.com/nsf/termbox-go v0.0.0-20200418040025-38ba6e5628f1
go: finding golang.org/x/sys v0.5.0
# golang.org/x/sys/unix
/go/pkg/mod/golang.org/x/sys@v0.5.0/unix/syscall.go:83:16: undefined: unsafe.Slice
/go/pkg/mod/golang.org/x/sys@v0.5.0/unix/syscall_linux.go:2271:9: undefined: unsafe.Slice
/go/pkg/mod/golang.org/x/sys@v0.5.0/unix/syscall_unix.go:118:7: undefined: unsafe.Slice
/go/pkg/mod/golang.org/x/sys@v0.5.0/unix/sysvshm_unix.go:33:7: undefined: unsafe.Slice
note: module requires Go 1.17

Issue 2

Step 4/4 : RUN mkdir /out &&     go build .
 ---> Running in 6298105a919c
go: downloading github.com/mattn/go-runewidth v0.0.9
go: downloading github.com/nsf/termbox-go v0.0.0-20200418040025-38ba6e5628f1
client.go:36:2: no required module provides package golang.org/x/net/icmp; to add it:
        go get golang.org/x/net/icmp
client.go:37:2: no required module provides package golang.org/x/net/ipv4; to add it:
        go get golang.org/x/net/ipv4
client.go:38:2: no required module provides package golang.org/x/net/ipv6; to add it:
        go get golang.org/x/net/ipv6

To fix the 2 issues

diff --git a/Dockerfile b/Dockerfile
index 8676acb..936ca02 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,8 +1,10 @@
-FROM golang:1.13
+FROM golang:1.19

 WORKDIR /app

 ADD ./ /app

+RUN go get golang.org/x/net
+
 RUN mkdir /out && \
     go build .
diff --git a/go.mod b/go.mod
index dc863c7..62c1c5e 100644
--- a/go.mod
+++ b/go.mod

Start with Dockerfile and go.mod, then reproduce the reported failures with the Docker build command. Verify that the Go version and declared module dependencies address both errors, and consider the work done when the image builds successfully.