ci: port github action to forgejo action

.forgejo/workflows/test.yml

@@ -1,4 +1,5 @@
 # https://devenv.sh/integrations/github-actions
+# https://forgejo.org/docs/latest/user/actions/
 name: Test
 on:
   push:
@@ -8,19 +9,13 @@ on:
 jobs:
   test:
     name: Test
-    runs-on: ubuntu-latest
-    permissions:
-      id-token: write
-      contents: read
+    runs-on: docker
+    container:
+      image: ghcr.io/cachix/devenv/devenv:latest
     steps:
       - uses: actions/checkout@v4
-      - uses: DeterminateSystems/determinate-nix-action@v3
-      - uses: DeterminateSystems/flakehub-cache-action@main
-      - uses: DeterminateSystems/flake-checker-action@main
       - name: Install devenv.sh
         run: nix profile install nixpkgs#devenv
-      - name: Cache turbo build
-        uses: dtinth/setup-github-actions-caching-for-turbo@v1
       - run: devenv shell pnpm install
       - run: devenv shell pnpm lint
       - run: devenv shell pnpm build

README.md

@@ -5,7 +5,7 @@
 
 A collection of "pomp-branded" websites.
 
-![example website screenshot](./.github/img/pompydev.avif)
+![example website screenshot](./.forgejo/img/pompydev.avif)
 
 ## Sites