Added instructions for installing using Docker for Windows (#1817)
Added instructions for installing using Docker for Windows (#1817)

[skip ci]
Praetonus/ponyc,mkfifo/ponyc,boemmels/ponyc,Theodus/ponyc,cquinn/ponyc,boemmels/ponyc,Theodus/ponyc,mkfifo/ponyc,mkfifo/ponyc,cquinn/ponyc,jemc/ponyc,kulibali/ponyc,Theodus/ponyc,Perelandric/ponyc,boemmels/ponyc,Theodus/ponyc,Perelandric/ponyc,ponylang/ponyc,boemmels/ponyc,Perelandric/ponyc,cquinn/ponyc,Theodus/ponyc,Praetonus/ponyc,cquinn/ponyc,sgebbie/ponyc,ponylang/ponyc,jemc/ponyc,Perelandric/ponyc,kulibali/ponyc,dipinhora/ponyc,CausalityLtd/ponyc,Perelandric/ponyc,CausalityLtd/ponyc,jemc/ponyc,CausalityLtd/ponyc,mkfifo/ponyc,mkfifo/ponyc,ponylang/ponyc,dipinhora/ponyc,Praetonus/ponyc,dipinhora/ponyc,sgebbie/ponyc,sgebbie/ponyc,kulibali/ponyc,Praetonus/ponyc,sgebbie/ponyc,boemmels/ponyc,kulibali/ponyc,sgebbie/ponyc