feat: enable local frontend development with a Caddy proxy in Docker

Caddyfile

@@ -0,0 +1,25 @@
+:8800
+
+@room {
+	path_regexp room ^/[0-9]+$
+}
+
+@root {
+	path root /
+}
+
+route @room {
+	rewrite * /room.html
+	file_server {
+		root /srv
+	}
+}
+
+route @root {
+	rewrite * /index.html
+	file_server {
+		root /srv
+	}
+}
+
+reverse_proxy meetingmood:8844

README.md

@@ -33,6 +33,12 @@ You can optionally:
 4. Press buttons to make hand signals
 5. Press `x` to stop making a hand signal
 
+## Development
+
+For purely-frontend development we provide a handy docker-compose environment which will let you make changes to the html without needing Go.
+
+Running `docker-compose up` will launch a Caddy proxy listening on http://localhost:8800/ as well as building and launching the checked-out Go code.  You can then make changes to the html pages and refresh the browser without needing to rebuild any of the backend components.
+
 ## Donations
 
 [![ko-fi](https://ko-fi.com/img/githubbutton_sm.svg)](https://ko-fi.com/wheresalice)

docker-compose.yml

@@ -0,0 +1,15 @@
+version: "3.7"
+
+services:
+  meetingmood:
+    build: .
+  caddy:
+    image: caddy:latest
+    restart: unless-stopped
+    ports:
+      - "8800:8800"
+    volumes:
+      - $PWD/Caddyfile:/etc/caddy/Caddyfile
+      - $PWD:/srv
+    depends_on:
+      - meetingmood