Forces JSON log format in prod settings

[conorsch]

Two changes here, both intended to standardize the production logging story:

• Bumps logging reqs to include changes from https://github.com/freedomofpress/django-logging/pull/5
• Forces JSON logging format by disabling "other" loggers (which may not be logging in JSON)

Upon merge, the new container will be pushed to the testing cluster, and we can evaluate the logging change there.

Testing

Using the prod docker-compose environment, you can observe that on current master, each request generates at least two events, on JSON and one plaintext:

django_1 | [2019-08-12 16:26:10 +0000] [21] [DEBUG] GET /sites/ django_1 | {"created": 1565627171, "levelname": "INFO", "request": {"data": {}, "meta": {"http_host": "localhost:8000", "http_user_agent": "Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0", "path_info": "/sites/", "remote_addr": "172.18.0.1"}, "method": "GET", "path": "/sites/", "scheme": "http", "user": "AnonymousUser"}, "response": {"charset": "utf-8", "headers": {"Content-Type": "text/html; charset=utf-8"}, "reason": "OK", "status": 200}}

Whereas on this branch, after running docker-compose -f prod-docker-compose.yaml up --build, you'll see only one log event per request:

django_1 | {"created": 1565628214, "levelname": "INFO", "request": {"data": {}, "meta": {"http_host": "localhost:8000", "http_user_agent": "Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0", "path_info": "/sites/", "remote_addr": "172.18.0.1"}, "method": "GET", "path": "/sites/", "scheme": "http", "user": "AnonymousUser"}, "response": {"charset": "utf-8", "headers": {"Content-Type": "text/html; charset=utf-8"}, "reason": "OK", "status": 200}} django_1 | {"created": 1565628218, "levelname": "INFO", "request": {"data": {}, "meta": {"http_host": "localhost:8000", "http_user_agent": "Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0", "path_info": "/sites/the-intercept", "remote_addr": "172.18.0.1"}, "method": "GET", "path": "/sites/the-intercept", "scheme": "http", "user": "AnonymousUser"}, "response": {"charset": "utf-8", "headers": {"Content-Type": "text/html; charset=utf-8"}, "reason": "OK", "status": 200}} django_1 | {"created": 1565628224, "levelname": "INFO", "request": {"data": {}, "meta": {"http_host": "localhost:8000", "http_user_agent": "Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0", "path_info": "/sites/", "remote_addr": "172.18.0.1"}, "method": "GET", "path": "/sites/", "scheme": "http", "user": "AnonymousUser"}, "response": {"charset": "utf-8", "headers": {"Content-Type": "text/html; charset=utf-8"}, "reason": "OK", "status": 200}} django_1 | {"created": 1565628243, "levelname": "INFO", "request": {"data": {}, "meta": {"http_host": "localhost:8000", "http_user_agent": "Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0", "path_info": "/sites/the-moscow-times", "remote_addr": "172.18.0.1"}, "method": "GET", "path": "/sites/the-moscow-times", "scheme": "http", "user": "AnonymousUser"}, "response": {"charset": "utf-8", "headers": {"Content-Type": "text/html; charset=utf-8"}, "reason": "OK", "status": 200}} django_1 | {"created": 1565628250, "exception": {"message": "", "traceback": [{"file": "/usr/local/lib/python3.6/site-packages/django/core/handlers/base.py", "line": 124, "method": "_get_response"}, {"file": "/usr/local/lib/python3.6/site-packages/wagtail/core/views.py", "line": 17, "method": "serve"}, {"file": "/usr/local/lib/python3.6/site-packages/wagtail/core/models.py", "line": 610, "method": "route"}], "type": "django.http.response.Http404"}, "levelname": "ERROR", "request": {"data": {}, "meta": {"http_host": "localhost:8000", "http_user_agent": "Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0", "path_info": "/sites/the-moscow-times/asdlkfjsadf/", "remote_addr": "172.18.0.1"}, "method": "GET", "path": "/sites/the-moscow-times/asdlkfjsadf/", "scheme": "http", "user": "AnonymousUser"}} django_1 | {"created": 1565628251, "levelname": "WARNING", "request": {"data": {}, "meta": {"http_host": "localhost:8000", "http_user_agent": "Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0", "path_info": "/sites/the-moscow-times/asdlkfjsadf/", "remote_addr": "172.18.0.1"}, "method": "GET", "path": "/sites/the-moscow-times/asdlkfjsadf/", "scheme": "http", "user": "AnonymousUser"}, "response": {"charset": "utf-8", "headers": {"Content-Type": "text/html; charset=utf-8"}, "reason": "Not Found", "status": 404}}