Set up basic CI

.drone.yml

@@ -25,13 +25,13 @@ steps:
       # Check formatting
       - mix format --check-formatted
       # Wait for postgres to become available
-      - |    
+      - |
         for i in {1..20}; do
           pg_isready -h postgres -p $DATABASE_PORT && break
           sleep 2
         done
         echo "Postgres did not become available, aborting"
         exit 1
-    done
+        done
       # Run tests
       - mix test