feat: add CI path filters and expand README (#82)

.github/workflows/docker-image.yml

@@ -7,6 +7,9 @@ on:
     - cron: "0 2 * * 1" # At 2:00 on Monday.
   push:
     branches: ["main"]
+    paths:
+      - "**/Dockerfile"
+      - ".github/workflows/**"
   workflow_dispatch:
 
 env:

.github/workflows/pr-build.yml

@@ -5,6 +5,9 @@ name: PR Build and Report
 on:
   pull_request:
     types: [opened, synchronize, reopened]
+    paths:
+      - "**/Dockerfile"
+      - ".github/workflows/**"
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}

.github/workflows/pr-lint.yml

@@ -5,8 +5,20 @@ name: Lint Code Base
 on:
   push:
     branches: [master, main]
+    paths:
+      - "**/Dockerfile"
+      - ".github/workflows/**"
+      - ".mega-linter.yml"
+      - ".hadolint.yaml"
+      - ".yamllint.yml"
   pull_request:
     branches: [master, main]
+    paths:
+      - "**/Dockerfile"
+      - ".github/workflows/**"
+      - ".mega-linter.yml"
+      - ".hadolint.yaml"
+      - ".yamllint.yml"
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}