message: add install doc to TOC
diff: @@ -7,6 +7,7 @@ pages:
  - Deploying Lagoon Projects: using_lagoon/deploying.md
  - Administration:
  - Administering Lagoon: administering_lagoon/index.md
  + - Installing Lagoon: administering_lagoon/install.md
  - Development:
  - Developing Lagoon: developing_lagoon/index.md
  - Tests: developing_lagoon/tests.md
  