Postgres migrations: remove balance view before children (#353)

* remove balance view before childredn

* update readme

* CI with postgres

* install postgres in CI

* run postgres tests in CI?

* disable postgres tests for now

.github/workflows/tests.yml

@@ -5,11 +5,27 @@ on: [push, pull_request]
 jobs:
   poetry:
     runs-on: ${{ matrix.os }}
+    services:
+      postgres:
+        image: postgres:latest
+        env:
+          POSTGRES_USER: cashu
+          POSTGRES_PASSWORD: cashu
+          POSTGRES_DB: cashu
+        ports:
+          - 5432:5432
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
     strategy:
       matrix:
         os: [ubuntu-latest]
         python-version: ["3.10.4"]
         poetry-version: ["1.5.1"]
+        # db-url: ["", "postgres://cashu:cashu@localhost:5432/test"] # TODO: Postgres test not working
+        db-url: [""]
     steps:
       - name: Checkout repository and submodules
         uses: actions/checkout@v2
@@ -26,7 +42,7 @@ jobs:
           cache: "poetry"
       - name: Install dependencies
         run: |
-          poetry install
+          poetry install --extras pgsql
         shell: bash
       - name: Run tests
         env:
@@ -34,6 +50,7 @@ jobs:
           WALLET_NAME: test_wallet
           MINT_HOST: localhost
           MINT_PORT: 3337
+          MINT_DATABASE: ${{ inputs.db-url }}
           TOR: false
         run: |
           make test