Enable redis as a caddy shared storage module (#77)

- Lets engineers share letsencrypt storage
- Reduces the amount of calls we make to letsencrypt
- Reduces the amount of rate limits we hit

Wait 5 seconds for cloudflare tunnel to start (#76)

Solves visiting the tunnel too quickly causes ip problems

Do not use previous --no-tunnel (#73)

Fix localdns, add --no-tunnel (#72)

Local-dns was broke because asking dnsmasq to reload did not get it to
reload the config file from start.
Here, we create the config file correctly from the beginning instead.
Much nicer.

I have also added a `--no-tunnel` argument, this both helps when
cloudflare is down, but also to check if local-dns works 😅

Only route local dns to active sessions (#60)

- Users may want to view other linkup sessions, or preview environments.
- With local-dns enabled, all these are routed to the local server where
the session does not exist
- Default dnsmasq to route to the public internet, but add special rules
for the active local session instead
- An annoying side-effect of this is still that linkup needs to be
started (for dnsmasq to be started) to view sessions, but 🤷

linkup 0.2.7

Unfold cookies on local server (#58)

- when local-dns is enabled, folded cookies can come through the local
server

Use all domains in caddy config (#55)

supports *.api.mentimeter.dev for example

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Co-authored-by: Augusto César <augusto.silva@mentimeter.com>

Do not follow redirects on local linkup server (#53)

This does not make it work when using a cloudflare worker / tunnel. 

The wasm client of reqwest does not support their "redirect policies"
yet:

https://github.com/seanmonstar/reqwest/blob/master/src/wasm/client.rs

Do not print non json in json mode (#52)