message: Fix broken docs logo image by adding missing "!". Fixes
diff: -[The Lagoon logo is a blue hexagon split in two pieces with an L-shaped cut](/images/lagoon-logo.png)
  +![The Lagoon logo is a blue hexagon split in two pieces with an L-shaped cut](/images/lagoon-logo.png)
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  # Lagoon - Docker Build and Deploy System for OpenShift & Kubernetes
  