Let’s make sure we can start VS Code from the terminal:

Command + Shift + P
Type Shell
Select Command : Install code in PATH

Extensions

Rails

• Better Haml
• Cucumber (Gherkin) Full Support
• Ruby
• Ruby Solargraph
• ruby-rubocop

JavaScript

• ESLint
• Prettier

Git

• Git Lens

Elixir

• vscode-elixir

Other stuff

• pgFormatter
• Project Manager
• Bracket Pair Colorizer

Personal Settings

"editor.formatOnSave": true,
  "editor.fontLigatures": true,
  "editor.fontFamily": "FiraCode-Retina",
  "editor.fontSize": 18,
  "editor.renderIndentGuides": true,
  "files.exclude": {
    "**/.git": true,
    "**/node_modules": true,
    "**/bower_components": true,
    "**/tmp": true,
    "tmp/**": true,
    "**/vendor": true,
    "vendor": true,
    ".bundle": true,
    ".github": true,
    ".sass-cache": true,
    "features/reports": true
  },

  "editor.tabSize": 2,
  "prettier.singleQuote": true,
  "workbench.colorTheme": "Monokai",
  "window.zoomLevel": 0,
  "editor.renderWhitespace": "boundary",
  "editor.renderControlCharacters": true,

  "ruby.lint": {
    "rubocop": true,
    "ruby": true,
    "fasterer": true,
    "reek": false,
    "ruby-lint": false
  },
  "editor.quickSuggestions": {
    "strings": true
  },

  "cucumberautocomplete.steps": [
    "features/step_definitions/*.rb",
    "features/step_definitions/**/*.rb",
    "features/step_definitions/**/**/*.rb"
  ],
  "cucumberautocomplete.syncfeatures": "features/*feature"

Some common exclusions for .solagraph.yml (can place it in the root of your project)

---
include:
- "app/**/*.rb"
- "lib/**/*.rb"
- "engines/engine_name/app/**/*.rb"
- "engines/engine_name/lib/**/*.rb"
- "config/**/*.rb"
exclude:
- app/javascript/**/*
- node_modules/**/**
- spec/**/*
- test/**/*
- vendor/**/*
- ".bundle/**/*"
- .bundle/**/*
- uploads/**/*
- .bundle/**/*
- .git/**/*
- engines/engine_name/.bundle/**/*
- engines/engine_name/vendor/**/*
- coverage/**/*
require: []
domains: []
reporters:
- rubocop
- require_not_found
plugins: []
require_paths: []
max_files: 5000
plugins:
- runtime