Add MongoDB module documentation

Introduced a new documentation markdown file that provides instructions on how to use the MongoDB module in a .NET environment.

docs/modules/mongodb.md

@@ -0,0 +1,51 @@
+# MongoDB
+
+[MongoDB](https://www.mongodb.com/what-is-mongodb) is a cross-platform document-oriented database. MongoDB's document model is simple for developers to use within their applications, while still providing all the complex capabilities of traditional relational databases.
+
+The following example uses the following NuGet packages:
+
+```console title="Install the NuGet dependencies"
+dotnet add package Testcontainers.MongoDb
+dotnet add package MongoDB.Driver
+dotnet add package xunit
+```
+
+IDEs and editors may also require the following packages to run tests: `xunit.runner.visualstudio` and `Microsoft.NET.Test.Sdk`.
+
+Copy and paste the following code into a new `.cs` test file within an existing test project.
+
+```csharp
+using MongoDB.Driver;
+using Testcontainers.MongoDb;
+using Xunit;
+
+namespace TestcontainersModules;
+
+public class MongoDbContainerTest : IAsyncLifetime
+{
+ private readonly MongoDbContainer mongoDbContainer =
+ new MongoDbBuilder().Build();
+
+ [Fact]
+ public async Task ReadFromMongoDbDatabase()
+ {
+ var client =
+ new MongoClient(mongoDbContainer.GetConnectionString());
+
+ using var databases =
+ await client.ListDatabasesAsync();
+
+ Assert.True(await databases.AnyAsync());
+ }
+
+ public Task InitializeAsync()
+ => mongoDbContainer.StartAsync();
+
+ public Task DisposeAsync()
+ => mongoDbContainer.DisposeAsync().AsTask();
+}
+```
+
+To execute the tests, use the command `dotnet test` from a terminal.
+
+[xunit]: https://xunit.net/