"X-Cache: Miss from cloudfront" as a result of a call to AWS API Gateway - amazon-s3

Question

When I send a GET request to AWS APIGateway's URL "https://blablabla.execute-api.us-east-1.amazonaws.com/dev/crs/blablabla.png" or Custom Domain's URL "devblablabla.bla.com" via browser or POSTMAN I receive a 200 response with the "X-Cache: Miss from cloudfront" header:
GET request to AWS APIGateway
Do you have any idea how I can rewrite the serverless.yml file for receiving 200 response with the "X-cache:HIT" header?
This is the configuration that I deploy:
# serverless.yml
service: s3-blablabla-service
provider:
name: aws
stage: dev
region: us-east-1
environment:
SERVICE_NAME: ${self:service}
apiGateway:
binaryMediaTypes: "*/*"
plugins:
- serverless-apigateway-service-proxy
- serverless-domain-manager
- serverless-finch
custom:
c3launchBucketName: "blabla-pl-${self:provider.stage}"
c3scormBucketName: "blabla-crs-${self:provider.stage}"
domainName: "${self:provider.stage}blablabla.bla.com" # Change this to your domain.
basePath: "" # This will be prefixed to all routes
apiGatewayServiceProxies:
- s3:
path: /pl/{myKey+} # use path param
method: get
action: GetObject
bucket:
# ${self:custom.c3launchBucketName}
Ref: S3Bucket
key:
pathParam: myKey
requestParameters:
"integration.request.header.cache-control": "'public, max-age=31536000, immutable'"
- s3:
path: /crs/{myKey+} # use path param
method: get
action: GetObject
bucket:
# ${self:custom.c3scormBucketName}
Ref: S3ScormBucket
key:
pathParam: myKey
requestParameters:
"integration.request.header.cache-control": "'public, max-age=31536000, immutable'"
customDomain:
domainName: ${self:custom.domainName}
basePath: ${self:custom.basePath}
stage: ${self:provider.stage}
createRoute53Record: true
autoDomain: true
client:
bucketName: ${self:custom.c3launchBucketName}
resources:
Resources:
S3Bucket:
Type: 'AWS::S3::Bucket'
Properties:
BucketName: ${self:custom.c3launchBucketName}
S3ScormBucket:
Type: 'AWS::S3::Bucket'
Properties:
BucketName: ${self:custom.c3scormBucketName}
After the deployment I receive this result:
endpoints:
GET - https://blablabla.execute-api.us-east-1.amazonaws.com/dev/pl/{myKey+}
GET - https://blablabla.execute-api.us-east-1.amazonaws.com/dev/crs/{myKey+}
Service deployed to stack s3-blablabla-service-dev
Serverless Domain Manager:
Domain Name: devblablabla.bla.com
Target Domain: abrakadabra.cloudfront.net
Hosted Zone Id: BARBARBAR