Set up basic CI

.drone.yml

@@ -10,22 +10,6 @@ services:
       POSTGRES_PASSWORD: postgres
 
 steps:
-  - name: restore-cache-with-filesystem
-    # the `plugins` user seems to be owned by the drone organization
-    image: docker.io/library/plugins/cache:1.9
-    pull: true
-    settings:
-      backend: "filesystem"
-      restore: true
-      cache_key: "volume"
-      archive_format: "gzip"
-      # filesystem_cache_root: "/tmp/cache"
-      mount:
-        - "_build"
-    volumes:
-      - name: cache
-        path: /tmp/cache
-
   - name: check
     image: docker.io/library/elixir:1.18.3-otp-27
     commands:
@@ -52,8 +36,8 @@ steps:
       # Wait for postgres to become available
       - |
         for i in {1..20}; do
-          if pg_isready -h postgres -u postgres; then
-            exit 0
+          if pg_isready -h postgres; then
+            break
           else
             true
           fi
@@ -67,8 +51,8 @@ steps:
     environment:
       MIX_ENV: test
       TEST_POSTGRES_HOST: postgres
-    # depends_on:
-    #   - wait for postgres
+    depends_on:
+      - wait for postgres
     commands:
       # Install hex package manager
       - mix local.hex --force