Improve Ollama docs (#8417)

Author: eddumelendez

docs/modules/ollama.md

@@ -10,6 +10,28 @@ You can start an Ollama container instance from any Java application by using:
 [Ollama container](../../modules/ollama/src/test/java/org/testcontainers/ollama/OllamaContainerTest.java) inside_block:container
 <!--/codeinclude-->
 
+### Pulling the model
+
+Testcontainers allows [executing commands in the container](../features/commands.md). So, pulling the model is as simple as: 
+
+<!--codeinclude-->
+[Pull model](../../modules/ollama/src/test/java/org/testcontainers/ollama/OllamaContainerTest.java) inside_block:pullModel
+<!--/codeinclude-->
+
+### Create a new Image
+
+In order to create a new image that contains the model, you can use the following code:
+
+<!--codeinclude-->
+[Commit Image](../../modules/ollama/src/test/java/org/testcontainers/ollama/OllamaContainerTest.java) inside_block:commitToImage
+<!--/codeinclude-->
+
+And use the new image along with [Image name Substitution](../features/image_name_substitution.md#manual-substitution)
+
+<!--codeinclude-->
+[Use new Image](../../modules/ollama/src/test/java/org/testcontainers/ollama/OllamaContainerTest.java) inside_block:containerSubstitute
+<!--/codeinclude-->
+
 ## Adding this module to your project dependencies
 
 Add the following dependency to your `pom.xml`/`build.gradle` file:

modules/ollama/src/test/java/org/testcontainers/ollama/OllamaContainerTest.java

@@ -29,20 +29,26 @@ public void downloadModelAndCommitToImage() throws IOException, InterruptedExcep
         String newImageName = "tc-ollama-allminilm-" + Base58.randomString(4).toLowerCase();
         try (OllamaContainer ollama = new OllamaContainer("ollama/ollama:0.1.26")) {
             ollama.start();
+            // pullModel {
             ollama.execInContainer("ollama", "pull", "all-minilm");
+            // }
 
             String modelName = given()
                 .baseUri(ollama.getEndpoint())
                 .get("/api/tags")
                 .jsonPath()
                 .getString("models[0].name");
             assertThat(modelName).contains("all-minilm");
+            // commitToImage {
             ollama.commitToImage(newImageName);
+            // }
         }
         try (
+            // containerSubstitute {
             OllamaContainer ollama = new OllamaContainer(
                 DockerImageName.parse(newImageName).asCompatibleSubstituteFor("ollama/ollama")
             )
+            // }
         ) {
             ollama.start();
             String modelName = given()