Build tag only on tag, build latest on merge to main

.gitea/workflows/build.yaml

@@ -6,7 +6,7 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
-    container: registry.engen.priv.no/gitea-build:0.1.0
+    container: golang:1.24
     steps:
        - name: Setup SSH
          run: |

.gitea/workflows/kobuild.yaml

@@ -6,12 +6,7 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
-    container: registry.engen.priv.no/gitea-build:0.1.0
-    env:
-      GITEA_USER: ${{ secrets.GITEAUSER }}
-      GITEA_TOKEN: ${{ secrets.GITEATOKEN }}
-      GITEA_REGISTRY: gitea.engen.priv.no
-      GITEA_ORG: klauvsteinen
+    container: golang:1.24
     steps:
        - name: Setup SSH
          run: |
@@ -19,10 +14,14 @@ jobs:
            echo "${{ secrets.SSH_PRIVATE_KEY }}" > ~/.ssh/id_rsa
            chmod 600 ~/.ssh/id_rsa
            ssh-keyscan gitea-ssh.engen.priv.no >> ~/.ssh/known_hosts
+       - name: Install node and go
+         run: apt update && apt -y install nodejs
        - name: Check out repository code
          uses: actions/checkout@v4
        - name: ssh repo
          run: git config --global url.git@gitea-ssh.engen.priv.no:.insteadOf https://gitea.engen.priv.no/
+       - name: Install ko
+         run: go install github.com/google/ko@latest
       - name: Docker login
         run: echo "${GITEA_TOKEN}" | docker login "${GITEA_REGISTRY}" --username "${GITEA_USER}" --password-stdin
       - name: Build

.gitea/workflows/publish.yaml

@@ -8,13 +8,15 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
-    container: registry.engen.priv.no/gitea-build:0.1.0
+    container: golang:1.24-bookworm
     env:
       GITEA_USER: ${{ secrets.GITEAUSER }}
       GITEA_TOKEN: ${{ secrets.GITEATOKEN }}
       GITEA_REGISTRY: gitea.engen.priv.no
       GITEA_ORG: klauvsteinen
     steps:
+      - name: Install dependencies
+        run: apt update && apt -y install nodejs bash docker.io
       - name: Setup SSH
         run: |
           mkdir -p ~/.ssh
@@ -25,6 +27,8 @@ jobs:
         uses: actions/checkout@v4
       - name: ssh repo
         run: git config --global url.git@gitea-ssh.engen.priv.no:.insteadOf https://gitea.engen.priv.no/
+      - name: Install ko
+        run: go install github.com/google/ko@latest
       - name: Extract tag (outside container)
         shell: bash
         run: |