feat: switch default branch to main

Due to local tooling updates, all the other Dokku repositories are converging on 'main' as the default. This makes my local workflows for interacting with this repository annoying as I need to remember if the repo uses main or master. As such, the default branch is moving to main to reduce cognitive overhead while I maintain the repository.

.github/workflows/docker-push.yaml

@@ -34,16 +34,16 @@ jobs:
             echo -e "\u001b[32mDetected semver tag\u001b[0m"
             image_tag='${{ github.event.workflow_run.head_branch }}'
             push_enabled=true
-          elif [[ '${{ github.event.workflow_run.head_branch }}' == "master" ]]; then
-            echo -e "\u001b[32mDetected master branch\u001b[0m"
+          elif [[ '${{ github.event.workflow_run.head_branch }}' == "main" ]]; then
+            echo -e "\u001b[32mDetected main branch\u001b[0m"
             push_enabled=true
           elif [[ '${{github.ref_name}}' =~ ^[0-9]+\.[0-9]+\.[0-9]+ ]]; then
             echo -e "\u001b[32mDetected semver tag\u001b[0m"
             image_tag='${{ github.ref_name }}'
             push_enabled=true
             is_tagged=true
           else
-            echo "::warning ::Unable to detect semver tag or master branch"
+            echo "::warning ::Unable to detect semver tag or main branch"
             push_enabled=false
           fi
 

.github/workflows/lint.yaml

@@ -8,7 +8,7 @@ on:
       - "*"
   push:
     branches:
-      - "master"
+      - "main"
 
 concurrency:
   group: lint-${{ github.event.pull_request.number || github.ref }}

.github/workflows/trivy-analysis.yaml

@@ -5,7 +5,7 @@ name: trivy-analysis
 on:
   push:
     branches:
-      - master
+      - main
   pull_request:
 
 concurrency:
@@ -27,13 +27,13 @@ jobs:
       - name: Run Trivy vulnerability scanner
         uses: aquasecurity/trivy-action@master
         with:
-          image-ref: 'docker.io/dokku/ci-docker-image:${{ github.sha }}'
-          format: 'template'
-          template: '@/contrib/sarif.tpl'
-          output: 'trivy-results.sarif'
-          severity: 'CRITICAL,HIGH'
+          image-ref: "docker.io/dokku/ci-docker-image:${{ github.sha }}"
+          format: "template"
+          template: "@/contrib/sarif.tpl"
+          output: "trivy-results.sarif"
+          severity: "CRITICAL,HIGH"
 
       - name: Upload Trivy scan results to GitHub Security tab
         uses: github/codeql-action/upload-sarif@v3
         with:
-          sarif_file: 'trivy-results.sarif'
+          sarif_file: "trivy-results.sarif"