Use in-memory backends for Celery in tests and workflows

At the moment, this doesn't have much of an effect since most task
calls are mock'd out.

.github/workflows/django-tests.yml

@@ -1,9 +1,10 @@
+---
 name: Run Python Tests
 on:
   push:
-    branches: [ main ]
+    branches: [main]
   pull_request:
-    branches: [ main ]
+    branches: [main]
 
 jobs:
   build:
@@ -53,9 +54,8 @@ jobs:
         POSTGRES_USER: postgres
         POSTGRES_DB: github_actions
         POSTGRES_HOST: 127.0.0.1
-        CELERY_BROKER: ""
-        REDIS_BROKER_PORT: 6379
-        REDIS_BROKER_PASSWORD: beep
+        CELERY_BROKER_URL: memory://
+        CELERY_RESULT_BACKEND: cache+memory://
         USE_DUMMY_CACHE: true
         FLOWER_PORT: 8888
         EMAIL_HOST: "smtp.mailgun.org"

.github/workflows/mypy.yml

@@ -1,10 +1,11 @@
+---
 name: Mypy
 
 on:
   push:
-    branches: [ main ]
+    branches: [main]
   pull_request:
-    branches: [ main ]
+    branches: [main]
 
 jobs:
   build:
@@ -24,27 +25,9 @@ jobs:
     - name: Analysing the code with mypy
       env:
         SECRET_KEY: beepbeep
-        DEBUG: false
-        USE_HTTPS: true
         DOMAIN: your.domain.here
-        BOOKWYRM_DATABASE_BACKEND: postgres
-        MEDIA_ROOT: images/
-        POSTGRES_PASSWORD: hunter2
-        POSTGRES_USER: postgres
-        POSTGRES_DB: github_actions
-        POSTGRES_HOST: 127.0.0.1
-        CELERY_BROKER: ""
-        REDIS_BROKER_PORT: 6379
-        REDIS_BROKER_PASSWORD: beep
-        USE_DUMMY_CACHE: true
-        FLOWER_PORT: 8888
-        EMAIL_HOST: "smtp.mailgun.org"
-        EMAIL_PORT: 587
+        EMAIL_HOST: ""
         EMAIL_HOST_USER: ""
         EMAIL_HOST_PASSWORD: ""
-        EMAIL_USE_TLS: true
-        ENABLE_PREVIEW_IMAGES: false
-        ENABLE_THUMBNAIL_GENERATION: true
-        HTTP_X_FORWARDED_PROTO: false
       run: |
         mypy bookwyrm celerywyrm

pytest.ini

@@ -12,11 +12,8 @@ env =
     DOMAIN = your.domain.here
     BOOKWYRM_DATABASE_BACKEND = postgres
     MEDIA_ROOT = images/
-    CELERY_BROKER = ""
-    REDIS_BROKER_PORT = 6379
-    REDIS_BROKER_PASSWORD = beep
-    REDIS_ACTIVITY_PORT = 6379
-    REDIS_ACTIVITY_PASSWORD = beep
+    CELERY_BROKER_URL = memory://
+    CELERY_RESULT_BACKEND = cache+memory://
     USE_DUMMY_CACHE = true
     FLOWER_PORT = 8888
     EMAIL_HOST = "smtp.mailgun.org"