Switch back to old-styled CI/CD configuration

No more Nix :(

.gitlab-ci.yml

@@ -1,19 +1,37 @@
 ---
 default:
+  interruptible: true
   tags:
     - docker
     - linux
 
 stages:
+  - build
   - deploy
 
+workflow:
+  rules:
+    - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH
+
+build:site:
+  stage: build
+  image: alpine:edge
+  script:
+    - echo "https://dl-cdn.alpinelinux.org/alpine/edge/testing" >> /etc/apk/repositories
+    - apk add --no-cache hugo dart-sass
+    - hugo --gc --panicOnWarning
+  artifacts:
+    expire_in: 1 hour
+    paths:
+      - public/
+
 deploy:cloudflare_pages:
   stage: deploy
-  image: nixos/nix:2.18.1
-  variables:
-    NIX_CONFIG: experimental-features = nix-command flakes
-  script:
-    - nix build .
-    - nix run .#publish
-  rules:
-    - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH
+  image: node:21-alpine
+  script: |
+    npx wrangler pages deploy \
+      --project-name=folliehiyuki \
+      --branch="$CI_COMMIT_REF_NAME" \
+      public/
+  dependencies:
+    - build:site