Update SAM template for Google auth, Slack invocation, and deadline change

Add SLACK_NOTIFIER_ARN and GOOGLE_CLIENT_ID_PARAM env vars to submit order
function with lambda:InvokeFunction policy. Move close-form schedule to
Thursday 11:59pm EST/EDT.

template.yaml

@@ -230,6 +230,8 @@ Resources:
       Environment:
         Variables:
           FORM_API_KEY_SECRET: meal-order-manager/form-api-key
+          SLACK_NOTIFIER_ARN: !GetAtt SlackNotifierFunction.Arn
+          GOOGLE_CLIENT_ID_PARAM: /meal-order-manager/google-client-id
       Policies:
         - DynamoDBCrudPolicy:
             TableName: !Ref OrdersTable
@@ -237,6 +239,9 @@ Resources:
             - Effect: Allow
               Action: secretsmanager:GetSecretValue
               Resource: !Sub 'arn:aws:secretsmanager:${AWS::Region}:${AWS::AccountId}:secret:meal-order-manager/*'
+            - Effect: Allow
+              Action: lambda:InvokeFunction
+              Resource: !GetAtt SlackNotifierFunction.Arn
       Events:
         SubmitOrder:
           Type: HttpApi
@@ -279,14 +284,14 @@ Resources:
         CloseEST:
           Type: Schedule
           Properties:
-            Schedule: cron(0 23 ? * THU *)
-            Description: 'Close form Thursday 6pm EST (23:00 UTC)'
+            Schedule: cron(59 4 ? * FRI *)
+            Description: 'Close form Thursday 11:59pm EST (04:59 UTC Friday)'
             Enabled: true
         CloseEDT:
           Type: Schedule
           Properties:
-            Schedule: cron(0 22 ? * THU *)
-            Description: 'Close form Thursday 6pm EDT (22:00 UTC)'
+            Schedule: cron(59 3 ? * FRI *)
+            Description: 'Close form Thursday 11:59pm EDT (03:59 UTC Friday)'
             Enabled: true
 
   AggregateOrdersFunction: