Promtail End Point Failure At /loki/api/v1/push On EC2 Instance Via Docker – Amazon web services

I am using aws Instance and I am trying to run promtail in order to fetch logs and forward it to loki server. Promtail, Loki and Grafana are being run through Docker.
The Loki Server is runing on port 3100, Promtail on 3400 and Loki on 8001. Since It is an AWS platform what needs to be done so that It stops throwing error at http://43.206.43.87:3100/loki/api/v1/push end point.

here is my promtail-config.yaml

server:
  http_listen_port: 3400
  grpc_listen_port: 0

positions:
  filename: /tmp/positions.yaml

clients:
  - url: http://43.206.43.87:3100/loki/api/v1/push

scrape_configs:
- job_name: system
  static_configs:
  - targets:
      - 43.206.43.87
    labels:
      job: varlogs
      __path__: /var/log/*log

Here is my loki-config.yaml

auth_enabled: false

server:
  http_listen_port: 3100
  grpc_listen_port: 0

common:
  path_prefix: /tmp/loki
  storage:
    filesystem:
      chunks_directory: /tmp/loki/chunks
      rules_directory: /tmp/loki/rules
  replication_factor: 1
  ring:
    instance_addr: 43.206.43.87
    kvstore:
      store: inmemory

schema_config:
  configs:
    - from: 2020-10-24
      store: boltdb-shipper
      object_store: filesystem
      schema: v11
      index:
        prefix: index_
        period: 24h

ruler:
  alertmanager_url: http://localhost:9093

Please help me out