Set up basic CI

.drone.yml

@@ -10,7 +10,7 @@ services:
       POSTGRES_PASSWORD: postgres
 
 steps:
-  - name: lint and test
+  - name: check
     image: docker.io/library/elixir:1.18.3-otp-27
     commands:
       # Install hex package manager
@@ -30,7 +30,7 @@ steps:
       # Provide hints for improving code quality
       - mix credo
 
-  - name: postgres ready
+  - name: wait for postgres
     image: docker.io/library/postgres:17.2
     commands:
       # Wait for postgres to become available
@@ -52,7 +52,11 @@ steps:
       MIX_ENV: test
       TEST_POSTGRES_HOST: postgres
     depends_on:
-      - postgres ready
+      - wait for postgres
     commands:
+      # Install hex package manager
+      - mix local.hex --force
+      # Fetch dependencies
+      - mix deps.get
       # Run tests
       - mix test