Add more configurations for reverse proxies

People have choices. We should offer people the ability to take a look at the different options, instead of just pointing them to the Nginx setup from Misskey.

content/en/docs/install/fresh.md

@@ -263,6 +263,81 @@ running.
 See [Misskey's
 instructions](https://misskey-hub.net/en/docs/admin/nginx.html)
 
+### HAProxy
+> Heads up - Sharkey doesn't officially support HAProxy, but you can still find community support for it within the discord.
+
+Add these lines to your frontend:
+
+```haproxy
+  acl sharkey hdr(Host) -i myshark.ey
+  use_backend sharkey-be if sharkey
+```
+
+And these to your backend:
+
+```haproxy
+  backend sharkey-be
+    http-reuse aggressive
+    option forwarded
+    option forwardfor
+    mode http
+    option redispatch
+    timeout queue 15s
+    http-request set-header X-Real-IP %[src]
+    http-request set-header X-Forwarded-Proto https
+    server sharkey-server <ip>:3000 check observe layer7 error-limit 10 on-error mark-down inter 2s rise 10 slowstart 10s
+```
+
+Check out Latte Macchiato's [guide](https://blog.lattemacchiato.dev/how-to-make-your-fedi-instance-performance-not-suck/) to making your fedi instance suck for more optimization tricks with HAProxy.
+
+### Traefik
+> Heads up - Sharkey doesn't officially support Traefik, but you can still find community support for it within the discord.
+
+Our configs will make the assumptions that sharkey is listening to port `3000`, your https(443) entrypoint is called ``webSecure`` and that you have a certificate resolver ready called ``myResolver``. Change these as necessary. Remember to change ``myshark.ey`` to your instances domain name.
+
+#### Docker Labels
+Append these labels to your sharkey service in docker-compose.yml:
+
+```yml
+    ...[your docker config]...
+    labels:
+      - "traefik.http.routers.sharkey.rule=Host(`myShark.ey`)"
+      - "traefik.http.services.sharkey.loadbalancer.server.port=3000"
+      - "traefik.http.routers.sharkey.tls=true"
+      - "traefik.http.routers.sharkey.tls.certresolver=myResolver"
+    ...[your docker config]...
+```
+
+#### Dynamic Config
+insert this into your dynamic config:
+
+```yml
+http:
+  routers:
+      sharkey:
+        entryPoints: ["web", "webSecure"]
+        rule: "Host(`myshark.ey`)"
+        service: "sharkey-be"
+        tls:
+          certresolver: myResolver
+
+  services:
+    sharkey-be:
+      loadBalancer:
+        servers:
+          - url: "http://<ip>:3000"
+```
+
+### Caddy
+> Heads up - Sharkey doesn't officially support Caddy, but you can still find community support for it within the discord.
+
+In your Caddyfile, insert the following instructions. Note that ``<>`` denotes a required option, and ``[]`` is optional to have in your config.
+
+```Caddyfile
+<myshark.ey>
+reverse_proxy [ip]:3000
+```
+
 ## Update Sharkey
 
 ### With Docker