Root var l2configenv fix

[lovestaco]

What type of MR is this? (check all applicable)

• [ ] 🍕 Feature
• [x] 🐛 Bug Fix
• [x] 📝 Doc Update
• [ ] 🎨 Style
• [x] 🧑‍💻 Code Refactor
• [ ] 🔥 Performance Improvements
• [x] ✅ Test
• [x] 🤖 Build
• [ ] 🔁 CI
• [ ] ⏩ Revert

Description

This PR fixes the bug where if l2configenv or l2env was absent then l2 -e <l2filepath> would error out. Adding documentation update using make mkdocs. Adding PR template and instructions.

Important files to start review from

preprocess. go

Added tests?

• [x] 👍 yes
• [ ] 🙅 no, because they aren't needed
• [ ] 🙋 no, because I need help

Added to documentation?

If documentation update is there then run make mkdocs once PR is in acceptable state.

• [x] 📓 make mkdocs
• [ ] 📜 README.md
• [ ] 🙅 no documentation needed