Fix CI for Gitea Actions: remove volume mount, run all commands in container

The docker-compose.ci.yml mounted '.:/app' which works on GitHub Actions
(where the workspace is the repo root) but not on Gitea Actions (where
the workspace path differs). The built Docker image already has all files
from COPY . ./ so the volume mount is unnecessary for CI.

Also moved yarn install inside the container and run full test suite.

.gitea/workflows/ci.yml

@@ -23,9 +23,6 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v4
 
-      - name: Pull prebuilt images
-        run: docker compose pull
-
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
@@ -41,9 +38,10 @@ jobs:
       - name: Run Docker image
         run: docker compose up --detach
 
-      - name: Install Elixir and JS deps
+      - name: Install deps
         run: |
-          docker compose exec -T phx mix deps.get && yarn install && cd assets && yarn install && cd ..
+          docker compose exec -T phx mix deps.get
+          docker compose exec -T phx sh -c "cd assets && yarn install"
 
       - name: Create and Migrate database
         run: |
@@ -53,5 +51,5 @@ jobs:
       - name: Run code checks
         run: docker compose exec -T phx mix check --no-fix --no-retry
 
-      - name: Run API tests
-        run: docker compose exec -T phx mix test test/pinchflat_web/controllers/api test/pinchflat_web/api_auth_plug_test.exs --trace
+      - name: Run tests
+        run: docker compose exec -T phx mix test --trace

docker-compose.ci.yml

@@ -5,11 +5,6 @@ services:
       dockerfile: ./docker/dev.Dockerfile
     environment:
       - MIX_ENV=test
-    volumes:
-      - '.:/app'
-      # These lines ensure the deps can be saved as build artifacts for caching
-      - '/app/deps'
-      - '/app/_build'
     ports:
       - '4008:4008'
     command: tail -F /dev/null