Trigger resources stack as a stage in the pipeline

I'm having an issue with the resources stack in my pipeline Need a was to get new stage to setup and deploy the resources as a step before building the code Here i need to create a S3 bucket to hold the build artifacts, the bucket name should be related to the branch name triggering the pipeline like deploy/username_new_branch

Here's where I'm at right now

from constructs import Construct
from aws_cdk import (
    Tags,
    Stack,
    aws_s3 as s3,
    RemovalPolicy,
    aws_iam as iam,
    aws_codebuild as codebuild,
    aws_codepipeline as codepipeline,
    aws_codepipeline_actions as codepipeline_actions,
)

import yaml
with open('dev-config.yaml') as f:
    var = yaml.safe_load(f)
class PipelineStack(Stack):

    def __init__(self, scope: Construct, id: str, branch: str, **kwargs) -> None:
        super().__init__(scope, id, **kwargs)

        source_output = codepipeline.Artifact()
        output_Website = codepipeline.Artifact()

        pipeline = codepipeline.Pipeline(self, "Pipeline",
            pipeline_name=f"{branch}-build-pipeline-{var['environment']['suffix']}",
        )

        pipeline.add_stage(
            stage_name="SourceCode",
            actions=[
                codepipeline_actions.CodeStarConnectionsSourceAction(
                    action_name="GitLab_Source",
                    owner="demo-pipeline4",
                    repo="frontend",
                    branch=var['build']['branchName'],
                    output=source_output,
                    connection_arn=var['build']['gitlabConnection'],
                )
            ]
        )

        bucket = s3.Bucket(self,
                            f"{branch}-{var['environment']['prefix']}-{var['build']['project']}-bucket",
                            versioned=True,
                            bucket_name=f"{branch}-{var['environment']['prefix']}-react-{var['environment']['suffix']}",
                            removal_policy=RemovalPolicy.DESTROY,
                            block_public_access=s3.BlockPublicAccess.BLOCK_ALL)
        Tags.of(bucket).add("branch", branch)

        policy_statement = iam.PolicyStatement(
            effect=iam.Effect.ALLOW,
            actions=[
                "s3:PutObject",
                "s3:ListBucket",
            ],
            resources=[
                f"arn:aws:s3:::{branch}-{var['environment']['prefix']}-react-{var['environment']['suffix']}/*",
                f"arn:aws:s3:::{branch}-{var['environment']['prefix']}-react-{var['environment']['suffix']}",
            ]
        )
        policy_document = iam.PolicyDocument(statements=[policy_statement])

        pipeline.add_stage(
            stage_name="BuildReact",
            actions=[
                codepipeline_actions.CodeBuildAction(
                    action_name="CodeBuild",
                    project=codebuild.PipelineProject(self,
                        "Project",
                        build_spec=codebuild.BuildSpec.from_object({
                            "version": "0.2",
                            "phases": {
                                "build": {
                                    "commands": [
                                        "npm install",
                                        "npm run build",
                                        f"aws s3 cp --recursive ./build s3://{branch}-{var['environment']['prefix']}-react-{var['environment']['suffix']}",
                                    ]
                                }
                            }
                        }),
                        environment=codebuild.BuildEnvironment(
                            build_image=codebuild.LinuxBuildImage.STANDARD_7_0,
                        ),
                        role=iam.Role(self, "CodeBuildRole",
                            assumed_by=iam.ServicePrincipal("codebuild.amazonaws.com"),
                            inline_policies={
                                "S3AccessPolicy": policy_document
                            }
                        )
                    ),
                    input=source_output,
                    outputs=[output_Website],
                )
            ]
        )