feat: nutshell itests (#691)

.github/workflows/nutshell_itest.yml

@@ -0,0 +1,26 @@
+name: Nutshell integration
+
+on: [push, pull_request]
+
+jobs:
+  integration-tests:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Pull and start mint
+        run: |
+          docker run -d -p 3338:3338 --name nutshell -e MINT_LIGHTNING_BACKEND=FakeWallet -e MINT_LISTEN_HOST=0.0.0.0 -e MINT_LISTEN_PORT=3338 -e MINT_PRIVATE_KEY=TEST_PRIVATE_KEY cashubtc/nutshell:latest poetry run mint
+      - name: Check running containers
+        run: docker ps
+      - name: checkout
+        uses: actions/checkout@v4
+      - name: Install Nix
+        uses: DeterminateSystems/nix-installer-action@v11
+      - name: Nix Cache
+        uses: DeterminateSystems/magic-nix-cache-action@v6
+      - name: Rust Cache
+        uses: Swatinem/rust-cache@v2
+      - name: Test
+        run: nix develop -i -L .#stable --command just test-nutshell
+      - name: Show logs if tests fail
+        if: failure()
+        run: docker logs nutshell