2shortplanks: add my very own main.go
2shortplanks: add my very own main.go

My very own main.go file added during the workshop at Gophercon UK 2019

Change-Id: I3c3743dc8a03ae71909328616c911c44749dbc63
Reviewed-on: https://go-review.googlesource.com/c/scratch/+/191303
Reviewed-by: Daniel Martí <29bf28b42a938ace12a5819da4ed4ba03d82f315@mvdan.cc>
Run-TryBot: Daniel Martí <29bf28b42a938ace12a5819da4ed4ba03d82f315@mvdan.cc>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>

golang/scratch