feat(docs): Add API documentation overview file

API.md

@@ -0,0 +1,60 @@
+# API documentation
+
+## Create a server
+
+Create a server configuration.
+
+```http
+POST /api/config/server
+Content-Type: application/json
+
+{
+  "name": "server-name",
+  "cmd": "command to execute",
+  "cwd": "directory to execute command in",
+  "use_direnv": true,
+  "env": {
+    "ENV_VAR": "value"
+  }
+}
+```
+
+## Delete a server
+
+Delete a server configuration.
+
+```http
+DELETE /api/config/server/:name
+```
+
+## Start a server
+
+Start a server.
+
+```http
+POST /api/runner/:name
+```
+
+## Stop a server
+
+Stop a server.
+
+```http
+DELETE /api/runner/:name
+```
+
+## Fetch full state about all servers
+
+Fetch full state about all servers.
+
+```http
+GET /api/state
+```
+
+## Websocket to get real-time state updates
+
+Connect to a websocket to get real-time state updates.
+
+```http
+GET /api/ws
+```