Adds github action to check lockfile

Signed-off-by: Vicente Zepeda Mas <[email protected]>

.github/workflows/poetry-check.yaml

@@ -0,0 +1,20 @@
+name: Check poetry lockfile
+on: [ pull_request ]
+
+jobs:
+  build:
+    name: Check poetry lockfile
+    runs-on: ubuntu-20.04
+
+    steps:
+        - uses: actions/checkout@v3
+        - uses: actions/setup-python@v4
+          with:
+            python-version: "3.11"
+        - uses: Gr1N/setup-poetry@v8
+        - name: verify poetry instalation
+          run: poetry --version
+          working-directory: ./backend
+        - name: verify poetry lockfile
+          run: poetry check --lock
+          working-directory: ./backend