Allow for optionally passing options to .remove

The `Docker::Container` `remove` method in [docker-api conditionally accepts a hash of
options](https://github.com/upserve/docker-api/blob/6f7b7cd2b790ec0ca69f805d72ae0c504c8b2f49/lib/docker/container.rb#L248)

Furthermore, removing a docker container, by default, will [not remove the volumes](https://docs.docker.com/engine/api/v1.43/#tag/Container/operation/ContainerDelete)
unless you pass `v: true` as a parameter.

Without the ability to pass `v: true` we can end up with many dangling
volumes that take up disk space.

This commit adds an optional hash argument to the `DockerContainer`
`#remove` method, it defaults to an empty hash.

To assist with tests I've also added:
  - `DockerContainer#mounts` method which returns an array of the mount
  hashes from the container `#info`
  - `DockerContainer#mount_names` which returns an array of the mount
  names (ids)

core/lib/testcontainers/docker_container.rb

@@ -530,11 +530,12 @@ def kill(signal: "SIGKILL")
 
     # Removes the container.
     #
+    # @param options [Hash] Additional options to send to the container remove command.
     # @return [DockerContainer] The DockerContainer instance.
     # @return [nil] If the container does not exist.
     # @raise [ConnectionError] If the connection to the Docker daemon fails.
-    def remove
-      @_container&.remove
+    def remove(options = {})
+      @_container&.remove(options)
       @_container = nil
       self
     rescue Excon::Error::Socket => e
@@ -732,6 +733,24 @@ def first_mapped_port
       container_ports.map { |port| mapped_port(port) }.first
     end
 
+    # Returns the container's mounts.
+    #
+    # @return [Array<Hash>] An array of the container's mounts.
+    # @raise [ConnectionError] If the connection to the Docker daemon fails.
+    # @raise [ContainerNotStartedError] If the container has not been started.
+    def mounts
+      info["Mounts"]
+    end
+
+    # Returns the container's mount names.
+    #
+    # @return [Array<String>] The container's mount names.
+    # @raise [ConnectionError] If the connection to the Docker daemon fails.
+    # @raise [ContainerNotStartedError] If the container has not been started.
+    def mount_names
+      mounts.map { |mount| mount["Name"] }
+    end
+
     # Returns the value for the given environment variable.
     #
     # @param key [String] The environment variable's key.

core/test/docker_container_test.rb

@@ -82,9 +82,16 @@ def test_it_returns_the_container_port_bindings
     assert_equal({"80/tcp" => [{"HostPort" => "8080"}], "8080/tcp" => [{"HostPort" => "8081"}], "443/tcp" => [{"HostPort" => "443"}]}, container.port_bindings)
   end
 
-  def test_it_returns_the_container_volumes
+  def test_it_creates_and_returns_the_container_volumes
     container = Testcontainers::DockerContainer.new("hello-world", volumes: ["/tmp"])
+    container.start
+    mount_name = container.mount_names.first
+
+    assert_equal mount_name, Docker::Volume.get(mount_name).id
     assert_equal({"/tmp" => {}}, container.volumes)
+  ensure
+    container.stop if container.exists? && container.running?
+    container.remove({v: true}) if container.exists?
   end
 
   def test_it_returns_the_container_labels
@@ -271,6 +278,19 @@ def test_it_removes_a_container
     container.remove if container.exists?
   end
 
+  def test_it_removes_a_container_and_its_volumes
+    container = Testcontainers::DockerContainer.new("hello-world", volumes: ["/tmp"])
+    container.start
+    mount_name = container.mount_names.first
+    container.remove({v: true})
+
+    refute container.exists?
+    assert_raises(Docker::Error::NotFoundError) { Docker::Volume.get(mount_name) }
+  ensure
+    container.stop if container.exists? && container.running?
+    container.remove({v: true}) if container.exists?
+  end
+
   def test_it_restarts_a_container
     @long_running_container.start
     @long_running_container.restart