chore: better config when in dev vs prod
chore: better config when in dev vs prod

This commit basically changes the config depending on if we're in
development or production (`npm start` vs `npm build`), basically so we
don't have to manually change `src/config.js` every time and then
reset before/avoid to commit.

License: MIT
Signed-off-by: Victor Bjelkholm <46f1a0bd5592a2f9244ca321b129902a06b53e03@victor.earth>

ipfs-shipyard/peerpad,ipfs-shipyard/peerpad