docs: add initial documentation to external assets

apps/server/src/external/README.md

@@ -0,0 +1,9 @@
+# External
+
+This folder contains resources which will be distributed as part of Ontime's infrastructure.
+Folders added here would be available at
+``` bash
+http://<ip-address>:<port>/external/<folder-name>
+```
+
+https://docs.getontime.no/features/custom-views/

apps/server/src/external/demo/README.md

@@ -0,0 +1,3 @@
+## Demo
+
+This is a demo application which demonstrates how to create a custom view leveraging a websocket client to get data from Ontime.

apps/server/src/external/styles/override.css

@@ -1,39 +0,0 @@
-:root {
-    --background-color-override: #ececec;
-    --color-override: #101010;
-    --secondary-color-override: #404040;
-    --accent-color-override: #fa5656;
-    --label-color-override: #6c6c6c;
-    --timer-color-override: #202020;
-    --card-background-color-override: #fff;
-    --card-background-color-blink-override: #339e4e;
-    --font-family-override: "Open Sans";
-    --font-family-bold-override: "Arial Black";
-    --timer-progress-bg-override: #fff;
-    --timer-progress-override: #202020;
-
-    --external-color-override: #161616;
-
-    --cuesheet-running-bg-override: #D20300;
-
-    --operator-running-bg-override: #D20300;
-    --operator-highlight-override: #FFAB33;
-
-    --studio-active: #101010;
-    --studio-idle: #cfcfcf;
-    --studio-active-label: #101010;
-    --studio-idle-label: #595959;
-    --studio-overtime: #101010;
-
-    --lowerThird-font-family-override: 'Times New Roman';
-    --lowerThird-top-font-weight-override: bold;
-    --lowerThird-bottom-font-weight-override: bold;
-    --lowerThird-top-font-style-override: normal;
-    --lowerThird-bottom-font-style-override: italic;
-    --lowerThird-line-height-override: 1vh;
-    --lowerThird-text-align-override: center;
-}
-
-.timer {
-    color: black !important;
-}