Remove appsettings.json from the repository and update .gitignore

.gitignore

@@ -7,3 +7,4 @@ riderModule.iml
 /.vs/Submission.Api
 /.vs/ProjectEvaluation
 /Submission.Api/Petitions
+/Submission.Api/appsettings.json

Submission.Api/appsettings.json

@@ -1,16 +0,0 @@
-{
-  "PetitionSettings": {
-    "AllowPetitionCreation": true
-  },
-  "MongoDbSettings": {
-    "ConnectionString": "mongodb://localhost:27017",
-    "DatabaseName": "petition_database"
-  },
-  "Logging": {
-    "LogLevel": {
-      "Default": "Information",
-      "Microsoft.AspNetCore": "Warning"
-    }
-  },
-  "AllowedHosts": "*"
-}