code-slides: add bash script with go get

in the july 2023 workshop some attendees were confused on how to
import a go database driver. This will show how to do that.

Signed-off-by: soypete <[email protected]>

code-slides/day-2-databases/go-import.sh

@@ -0,0 +1,8 @@
+#!bin/bash
+# This script will show you how to 
+# get the go package from github
+
+go mod init github.com/{username}/repo
+go get "github.com/mattn/go-sqlite3"
+go mod tidy
+