feat: change dockerfile to use builder

.gitea/workflows/build-and-push.yml

@@ -1,71 +0,0 @@
-name: Build and push Docker image
-
-on:
-  push:
-    branches: [ "main" ]
-    tags: [ "v*" ]
-  workflow_dispatch: {}
-
-jobs:
-  build-and-push:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout source
-        uses: actions/checkout@v4
-
-      - name: Compute image metadata
-        id: meta
-        env:
-          REGISTRY: ${{ secrets.REGISTRY }}
-          REGISTRY_IMAGE: ${{ secrets.REGISTRY_IMAGE }}
-        run: |
-          REPO_LC="${GITHUB_REPOSITORY,,}"
-          REG="${REGISTRY:-docker.io}"
-          IMAGE="${REGISTRY_IMAGE:-${REG}/${REPO_LC}}"
-          echo "registry=${REG}" >> "$GITHUB_OUTPUT"
-          echo "image=${IMAGE}" >> "$GITHUB_OUTPUT"
-          if [ "$GITHUB_REF_TYPE" = "tag" ]; then
-            TAGS="${IMAGE}:${GITHUB_REF_NAME}"
-          else
-            SHA=$(git rev-parse --short HEAD)
-            TAGS="${IMAGE}:${SHA},${IMAGE}:latest"
-          fi
-          echo "tags=${TAGS}" >> "$GITHUB_OUTPUT"
-
-      - name: Log in to container registry (if credentials provided)
-        env:
-          REGISTRY: ${{ steps.meta.outputs.registry }}
-          REGISTRY_USERNAME: ${{ secrets.REGISTRY_USERNAME }}
-          REGISTRY_PASSWORD: ${{ secrets.REGISTRY_PASSWORD }}
-        run: |
-          if [ -n "$REGISTRY_USERNAME" ] && [ -n "$REGISTRY_PASSWORD" ]; then
-            echo "$REGISTRY_PASSWORD" | docker login "$REGISTRY" -u "$REGISTRY_USERNAME" --password-stdin
-          else
-            echo "No registry credentials provided; skipping login."
-          fi
-
-      - name: Build Docker image
-        env:
-          TAGS: ${{ steps.meta.outputs.tags }}
-        run: |
-          IFS=',' read -ra TAGS_ARR <<< "$TAGS"
-          FIRST_TAG="${TAGS_ARR[0]}"
-          docker build -t "$FIRST_TAG" .
-          for TAG in "${TAGS_ARR[@]:1}"; do
-            docker tag "$FIRST_TAG" "$TAG"
-          done
-
-      - name: Push Docker image (if logged in)
-        env:
-          TAGS: ${{ steps.meta.outputs.tags }}
-          REGISTRY_USERNAME: ${{ secrets.REGISTRY_USERNAME }}
-          REGISTRY_PASSWORD: ${{ secrets.REGISTRY_PASSWORD }}
-        run: |
-          if [ -n "$REGISTRY_USERNAME" ] && [ -n "$REGISTRY_PASSWORD" ]; then
-            IFS=',' read -ra TAGS_ARR <<< "$TAGS"
-            for TAG in "${TAGS_ARR[@]}"; do
-              docker push "$TAG"
-            done
-          else
-            echo "No registry credentials provided; skipping push."
-          fi

Dockerfile

@@ -1,8 +1,7 @@
-FROM golang:alpine as builder
+FROM git.jokresner.de/johannes/personal-blog-builder:latest as builder
 
 WORKDIR /app
 COPY . .
-RUN go install github.com/gohugoio/hugo@latest
 RUN hugo --minify
 
 FROM nginx:alpine