chore: Revert to using GitHub runners

.github/workflows/ghcr-publish.yml

@@ -27,9 +27,9 @@ jobs:
         platform: [linux/amd64, linux/arm64]
         include:
           - platform: linux/amd64
-            runs-on: blacksmith-4vcpu-ubuntu-2404
+            runs-on: ubuntu-latest
           - platform: linux/arm64
-            runs-on: blacksmith-8vcpu-ubuntu-2204-arm
+            runs-on: ubuntu-24.04-arm
 
     steps:
       - name: Prepare
@@ -57,8 +57,8 @@ jobs:
         with:
           cosign-release: "v2.2.4"
 
-      - name: Setup Blacksmith Builder
-        uses: useblacksmith/setup-docker-builder@v1
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
 
       - name: Login to GitHub Packages Docker Registry
         uses: docker/login-action@v3
@@ -69,10 +69,12 @@ jobs:
 
       - name: Build Docker image
         id: build
-        uses: useblacksmith/build-push-action@v2
+        uses: docker/build-push-action@v6
         with:
           context: .
           labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha,scope=${{ env.PLATFORM_PAIR }}
+          cache-to: type=gha,mode=max,scope=${{ env.PLATFORM_PAIR }}
           platforms: ${{ matrix.platform }}
           outputs: type=image,name=${{ env.REGISTRY_IMAGE }},push-by-digest=true,name-canonical=true,push=true,annotation.org.opencontainers.image.description=Blazingly fast code search
           build-args: |
@@ -107,7 +109,7 @@ jobs:
         run: echo "${TAGS}" | xargs -I {} cosign sign --yes {}@${DIGEST}
 
   merge:
-    runs-on: blacksmith-4vcpu-ubuntu-2404
+    runs-on: ubuntu-latest
     permissions:
       packages: write
     needs:
@@ -120,8 +122,8 @@ jobs:
           pattern: digests-*
           merge-multiple: true
 
-      - name: Setup Blacksmith Builder
-        uses: useblacksmith/setup-docker-builder@v1
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
 
       - name: Extract Docker metadata
         id: meta

.github/workflows/pr-gate.yml

@@ -8,7 +8,7 @@ on:
 
 jobs:
   build:
-    runs-on: blacksmith-4vcpu-ubuntu-2404
+    runs-on: ubuntu-latest
     permissions:
       contents: read
     steps:
@@ -19,6 +19,6 @@ jobs:
 
       - name: Build Docker image
         id: build
-        uses: useblacksmith/build-push-action@v2
+        uses: docker/build-push-action@v6
         with:
           context: .

.github/workflows/test-backend.yml

@@ -7,7 +7,7 @@ on:
 
 jobs:
   build:
-    runs-on: blacksmith-4vcpu-ubuntu-2404
+    runs-on: ubuntu-latest
     permissions:
       contents: read
     steps:

.github/workflows/test-web.yml

@@ -7,7 +7,7 @@ on:
 
 jobs:
   build:
-    runs-on: blacksmith-4vcpu-ubuntu-2404
+    runs-on: ubuntu-latest
     permissions:
       contents: read
     steps: