Merge pull request #1 from jpower432/docs/c4-diagrams

docs: adds c4 architecture drawing for context,containers, and component

docs/diagrams/architecture/c4.md

@@ -0,0 +1,72 @@
+## Context
+
+```mermaid
+graph LR
+  subgraph External
+    User
+  end
+
+  subgraph Container
+    ContainerImage("Container Image")
+    TrestlebotContainer("Trestlebot Container")
+  end
+
+  subgraph GitHub
+    OSCALRepo("OSCAL Content Repository")
+    GithubActions("GitHub Actions")
+    CustomAction("Custom GitHub Action")
+  end
+
+  User -- Uses --> OSCALRepo
+  GithubActions -- Triggers --> CustomAction
+  CustomAction -- Builds --> ContainerImage
+  ContainerImage -- Runs --> TrestlebotContainer
+  OSCALRepo -- Uses --> GithubActions
+  User -- Uses --> GithubActions
+```
+
+## Container
+
+```mermaid
+graph LR
+  subgraph Container
+    ContainerImage("Container Image")
+    TrestlebotCLI("Trestlebot CLI")
+  end
+  subgraph GitHub
+    GithubActions("GitHub Actions")
+    CustomAction("Custom GitHub Action")
+  end
+
+
+  GithubActions -- Triggers --> CustomAction
+  CustomAction -- Builds --> ContainerImage
+  ContainerImage -- Distributes --> TrestlebotCLI
+```
+
+## Component
+
+```mermaid
+graph TD
+  subgraph Container
+    TrestlebotCLI("Trestlebot CLI")
+    Entrypoint("Entrypoint script")
+  end
+
+  subgraph Runtime
+    EnvironmentVariables("Environment Variables")
+    GitRepo("Git Local Repository")
+  end
+
+  subgraph GitHub
+    GitHubAction("GitHub Action")
+    GitHubAPI("GitHub API")
+  end
+
+  GitHubAction -- Sets --> EnvironmentVariables
+  GitHubAction -- Uses --> Entrypoint
+  TrestlebotCLI -- Reads content --> GitRepo
+  Entrypoint -- Runs --> TrestlebotCLI
+  Entrypoint -- Reads --> EnvironmentVariables
+  TrestlebotCLI -- Update content --> GitHubAPI
+```