Use OVERRIDE as environment variable prefix

.github/workflows/pytest.yml

@@ -26,7 +26,8 @@ jobs:
         # FIXME: Why is it necessary to set FLASK_ENV to TESTING here when
         # pytest runs off GHA usually set this properly?
         run: >
-          docker run --network host -e FLASK_ENV=TESTING -e REDIS_HOST=localhost
-          -e REDIS_URL=redis://localhost:6379/8 --rm -u root glider-dac-build bash -c
+          docker run --network host -e FLASK_ENV=TESTING
+          -e OVERRIDE_REDIS_HOST=localhost -e OVERRIDE_REDIS_URL=redis://localhost:6379/8
+          --rm -u root glider-dac-build bash -c
           "pip install --no-cache -r /glider-dac/test_requirements.txt &&
            pytest /glider-dac/glider_dac/tests"

glider_dac/__init__.py

@@ -50,7 +50,7 @@ def create_app():
     # this is mainly for test runners which may not be using the containerized versions
     # of Redis
     # TODO: Move elsewhere, perhaps in config module?
-    app.config.from_prefixed_env("REDIS")
+    app.config.from_prefixed_env("OVERRIDE")
     app.config["SESSION_TYPE"] = "redis"
     app.config["SESSION_REDIS"] = redis.from_url(app.config["REDIS_URL"])
     app.json_encoder = LazyJSONEncoder