Make sample config just have the HS config

The other options are things people usually won't need or want to
set, so just keep it to the basics.

 * Rename config sample to match element-web
 * Update / simplify build instructions
 * Rename nginx config file to differentiate it from EC config

.env.example

@@ -5,7 +5,6 @@
 ####
 
 # Used for determining the homeserver to use for short urls etc.
-# VITE_DEFAULT_HOMESERVER=http://localhost:8008
 # VITE_FALLBACK_STUN_ALLOWED=false
 
 # VITE_CUSTOM_THEME=true

Dockerfile

@@ -9,7 +9,7 @@ RUN scripts/dockerbuild.sh
 FROM nginxinc/nginx-unprivileged:alpine
 
 COPY --from=builder /src/dist /app
-COPY config/default.conf /etc/nginx/conf.d/
+COPY config/nginx.conf /etc/nginx/conf.d/
 
 USER root
 

README.md

@@ -15,20 +15,19 @@ Until prebuilt tarballs are available, you'll need to build Element Call from so
 git clone https://github.com/vector-im/element-call.git
 cd element-call
 yarn
-cp .env.example .env
-cp sample.config.json public/config.json
-```
-
-You can now edit the configuration in `.env` and `public/config.json` to your liking. (See the [configuration](#Configuration) section for details.) The most important thing is to set `VITE_DEFAULT_HOMESERVER` to the homeserver that the app should use, such as `https://call.ems.host`.
-
-Next, build the project:
-
-```
 yarn build
 ```
 
 If all went well, you can now find the build output under `dist` as a series of static files. These can be hosted using any web server of your choice.
 
+You may also wish to add a configuration file (Element Call uses the domain it's hosted on as a Homeserver URL by default,
+but you can change this in the config file). This goes in `public/config.json` - you can use the sample as a starting point:
+
+```
+cp config/config.sample.json public/config.json
+# edit public/config.json
+```
+
 Because Element Call uses client-side routing, your server must be able to route any requests to non-existing paths back to `/index.html`. For example, in Nginx you can achieve this with the `try_files` directive:
 
 ```
@@ -59,11 +58,9 @@ git clone https://github.com/vector-im/element-call.git
 cd element-call
 yarn
 yarn link matrix-js-sdk
-cp .env.example .env
-cp sample.config.json public/config.json
 ```
 
-By default, the app expects you to have [Synapse](https://matrix-org.github.io/synapse/latest/setup/installation.html) installed locally and running on port 8008. If you wish to use another homeserver, you can set it in your `.env` file.
+By default, the app expects you to have [Synapse](https://matrix-org.github.io/synapse/latest/setup/installation.html) installed locally and running on port 8008. If you wish to use another homeserver, you can add a config file as above.
 
 You're now ready to launch the development server:
 

config/config.sample.json

@@ -0,0 +1,8 @@
+{
+  "default_server_config": {
+      "m.homeserver": {
+          "base_url": "https://call.ems.host",
+          "server_name": "call.ems.host"
+      }
+  }
+}

sample.config.json

@@ -1,5 +0,0 @@
-{
-  "rageshake": {
-    "submit_url": "https://element.io/bugreports/submit"
-  }
-}