add explicit commands to copy fastq files from .backup into dc_workshop/data

[taylorreiter]

We need to add explicit instructions to the episode 02 Assessing Read Quality to copy the fastq files from .backup/untrimmed_fastq/*fastq.gz.

The download worked quickly for some learners, but was very slow for others. An alternative would be to use a different instance type, as t2.medium has slow/moderate network speeds that are less reliable than other instances. However, this may cost most. A t2.medium costs $0.0464 per Hour and Low to Moderate network performance. A t3.medium costs $0.0416 per Hour and has up to 5 Gbps. An m5a.large costs $0.086 per Hour and has up to 10 Gbps.

[taylorreiter]

@ErinBecker

potential improvement for the AWS image, upgrade from t2.medium to t3.medium

[ErinBecker]

@taylorreiter - I'm looking into changing our AMI setup to be able to use the t3 instance type instead of t2, but think we should also include the command for copying data from .backup/, as even with the faster instance type, some learners will still experience problems with the large data download. I'm working on a PR to add this command now.

[taylorreiter]

@ErinBecker I totally agree! Thank you for working on upgrading to t3 and for working toward adding a copying command!