message: optimize discord team image
diff: import { makeStyles, createStyles, Theme } from '@material-ui/core'
  +import Image from 'next/image'
  import { socialUrls } from 'common/routes'
  import ExternalLink from 'components/common/ExternalLink'
  @@ -17,11 +18,16 @@ export default function DiscordImage() {
  const classes = useStyles()
  return (
  <ExternalLink href={socialUrls.discord}>
  - <img
  + <div className={classes.teamImage}>
  + <Image
  src="/img/discord-team-image.png"
  - className={classes.teamImage}
  alt="Podkrepi.bg team in Discord voice conference call"
  + width = {880}
  + height = {475.475}
  + objectFit = "contain"
  />
  + </div>
  +
  </ExternalLink>
  )
  }
  