Remove password in dockerfile, change guild/channel ids to bigint unsigned.

MySQL_docker/Dockerfile

@@ -1,5 +1,3 @@
 FROM mysql:latest
 
-ENV MYSQL_ROOT_PASSWORD=root
-
 COPY highscores_database.sql /docker-entrypoint-initdb.d/

MySQL_docker/highscores_database.sql

@@ -2,19 +2,19 @@ CREATE DATABASE highscores;
 use highscores;
 
 CREATE TABLE Guilds(
-   GuildId int not null,
-   SubmissionChannel int,
+   GuildId bigint unsigned not null,
+   SubmissionChannel bigint unsigned,
    UsernameLength smallint DEFAULT 12,
-   VerificationChannel int,
+   VerificationChannel bigint unsigned,
    PRIMARY KEY (GuildId)
 );
 
-CREATE TABLE CategoryGroups(
-   ChannelId int,
+CREATE TABLE Groups(
+   ChannelId bigint unsigned,
    GroupId int not null AUTO_INCREMENT,
    GroupName varchar(50) not null,
    GuildId int not null,
-   MessageId int,
+   MessageId bigint unsigned,
    PadLength smallint not null DEFAULT 26,
    Size smallint not null, -- unsure if I like this name. Also unsure belong here or in Category
    FOREIGN KEY (GuildId) REFERENCES Guilds(GuildId),