⬆️ Update Dockerfile to rc1-update1 tag. Closes #533

[peterblazejewicz]

This commits updates tags used for official aspnet-dockerfile
images.
See: http://git.io/vRNjH

The content is tested with generated WebApplication template (which uses SQLite) and Docker 1.9.1:

docker build -t webapp .
Sending build context to Docker daemon 255.5 kB
Step 1 : FROM microsoft/aspnet:1.0.0-rc1-update1
1.0.0-rc1-update1: Pulling from microsoft/aspnet

789f6c797444: Pull complete 
...

docker build -t webapp .            
Sending build context to Docker daemon 255.5 kB
Step 1 : FROM microsoft/aspnet:1.0.0-rc1-update1-coreclr
1.0.0-rc1-update1-coreclr: Pulling from microsoft/aspnet
ec73306ee200: Pull complete 
...

Thanks!

[peterblazejewicz]

Thanks!