Updated drone management service with Docker annotations

dronemgmt.bal

import ballerina/grpc;
import ballerina/log;
import ballerinax/docker;

@docker:Expose {}
endpoint grpc:Listener listener {
    host: "localhost",
    port: 9090
};

endpoint StatusQueryBlockingClient statusQueryBlockingEp {
        url:"http://localhost:9091"
};

map <DroneInfo> dronesMap;

type DroneInfo record {
    string id;
    string name;
    string description;
};

type DroneDetails record {
    DroneInfo info;
    float latitude;
    float longitude;
    float altitude;
    float battery_remaining;
};

@docker:Config {
    registry: "index.docker.io/kotancode",
    name:"dronemgmt",
    tag: "v1.0"
}