Add gofmt check and fix branch names

.github/workflows/e2e_tests.yml

@@ -2,7 +2,7 @@ name: Run E2E tests
 on:
   push:
     branches:
-      - 'master'
+      - 'main'
       - 'release-*'
   pull_request:
     branches:

.github/workflows/go.yml

@@ -6,7 +6,7 @@ name: Go
 on:
   push:
     branches:
-      - 'master'
+      - 'main'
       - 'release-*'
   pull_request:
     branches:
@@ -29,3 +29,18 @@ jobs:
 
     - name: Test
       run: make test
+
+  gofmt:
+    name: "Ensure that code is gofmt-ed"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@master
+      - name: Setup Golang
+        uses: actions/[email protected]
+        with:
+          go-version-file: './go.mod'
+      - name: "Run make fmt and then 'git diff' to see if anything changed: to fix this check, run make fmt and then commit the changes."
+        run: |
+          make fmt
+          git diff --exit-code -- .
+

.github/workflows/lint.yaml

@@ -1,12 +1,18 @@
 name: Lint code
 on:
+
+  push:
+    branches:
+      - 'main'
+      - 'release-*'
+
   pull_request:
     branches:
       - '*'     
 
 jobs:
   lint_code:
-    name: Run golangci-lint and gosec on PR
+    name: Run golangci-lint and gosec
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code