Imports github.com/gorilla/handlers github.com/gorilla/mux github.com/gorilla/websocket github.com/json-iterator/go github.com/streadway/amqp go.mongodb.org/mongo-driver/bson go.mongodb.org/mongo-driver/mongo go.mongodb.org/mongo-driver/mongo/options Standard library imports bytes context encoding/base64 fmt image image/jpeg log net/http os strconv sync time