Steps to run server in windows:

1. must have installed CockroachDB and golang

2. run on cmd console:

   go get -d github.com/buaazp/fasthttprouter
   go get -d github.com/lib/pq

3. initialize and create cockroach database:
   
   In the same console opened or another one, go to the directory where cockroach is. There execute:
   

   cockroach start-single-node --insecure --listen-addr=localhost:26257 --http-addr=localhost:5001
   In another cmd console
   cockroach sql --insecure create database reto_prueba; set database = reto_prueba;

4. creating tables needed into cockroach:
   
   In the last cmd console opened
   

   create table history (

        domain STRING(200) NOT NULL,
        searched_at TIMESTAMPTZ NOT NULL    
   

   );
   
   create table domain (

        name STRING(200) PRIMARY KEY,
        ssl_grade STRING(5) NOT NULL,
        previous_ssl_grade STRING(5) NOT NULL,
        searched_at TIMESTAMPTZ NOT NULL    
   

   );
   

5. run server:
   
   The server port it's found in Main.go file or in the console when server it's runnig
   

   go run Main.go Handler.go

Steps to install android apk:

In the folder ApiForDomains there's a file called App_V1_0.apk
That build apk has the ip of my localhost so must not work, you have to change it and re-build apk.
To edit and re-build you need Android Studio to open the project and change the IP, it's on Constants on the folder util.