feature/383 splash page

[ethangardner]

• add splash content
• update footer
• update landing page content
• add video
• add title to video iframe
• replaced splash page
• renamed splash page route to about
• add turn off staging server notice on marketing page
• update header with design changes
• remove unused styles
• linting

[github-actions]

Terraform plan for tts-10x-atj-dev

Plan: 0 to add, 2 to change, 0 to destroy.

Terraform used the selected providers to generate the following execution
plan. Resource actions are indicated with the following symbols:
!~  update in-place

Terraform will perform the following actions:

  # cloudfoundry_app.tts-10x-atj-dev-server-doj_tts-10x-atj-dev-server-doj-app_380DB029 will be updated in-place
!~  resource "cloudfoundry_app" "tts-10x-atj-dev-server-doj_tts-10x-atj-dev-server-doj-app_380DB029" {
!~      docker_image                    = "ghcr.io/gsa-tts/forms/server-doj:16bca789762cf39cb18fb6beb075510af6cfde36" -> "ghcr.io/gsa-tts/forms/server-doj:76fab15bbafca14fb6864d27346039140823b874"
        id                              = "8a9fc8b6-af5e-45a2-abb6-2c24ecbcdfaa"
        name                            = "tts-10x-atj-dev-server-doj-app"
#        (17 unchanged attributes hidden)

#        (3 unchanged blocks hidden)
    }

  # cloudfoundry_app.tts-10x-atj-dev-server-kansas_tts-10x-atj-dev-server-kansas-app_337A9CF1 will be updated in-place
!~  resource "cloudfoundry_app" "tts-10x-atj-dev-server-kansas_tts-10x-atj-dev-server-kansas-app_337A9CF1" {
!~      docker_image                    = "ghcr.io/gsa-tts/forms/server-kansas:16bca789762cf39cb18fb6beb075510af6cfde36" -> "ghcr.io/gsa-tts/forms/server-kansas:76fab15bbafca14fb6864d27346039140823b874"
        id                              = "e885e531-11b7-4906-9cc3-0ddf483868f5"
        name                            = "tts-10x-atj-dev-server-kansas-app"
#        (17 unchanged attributes hidden)

#        (3 unchanged blocks hidden)
    }

Plan: 0 to add, 2 to change, 0 to destroy.

📝 Plan generated in Post Terraform plan to PR comment #480