Add development environment to telemetry disclosure - #2431

Changed pages include:

• index.html - view
• 404.html - view
• blog/index.html - view
• case-studies/index.html - view
• partnerships/index.html - view
• press/index.html - view
• privacy/index.html - view
• showcase/index.html - view
• telemetry/index.html - view
• terms/index.html - view

There are more changes not included in the list