[MSFNW26] Add help with missing env and author contact info

[LucasHJin]

Notion ticket link

Dev Onboarding

Implementation description

• Provides help with missing env error when running docker-compose up
• Add Lucas Jin as an author

Steps to test

1. Open README.md
2. Read through help section

What should reviewers focus on?

• Verify that the markdown worked

Checklist

• My PR name is descriptive and in imperative tense
• My commit messages are descriptive and in imperative tense. My commits are atomic and trivial commits are squashed or fixup'd into non-trivial commits
• I have run the appropriate linter(s)
• I have requested a review from the PL, as well as other devs who have background knowledge on this PR or who will be building on top of this PR

[ericahan22]

Looks good to me!

[fiona-cai]

LGTM!