root: move webapp to /web (#347)

* root: move webapp to /web

* root: fix static build

* root: fix static files not being served for e2e tests

web/src/elements/CodeMirror.ts

@@ -0,0 +1,40 @@
+import { customElement, html, LitElement, property } from "lit-element";
+
+// @ts-ignore
+import CodeMirror from "codemirror";
+import "codemirror/addon/display/autorefresh";
+import "codemirror/mode/xml/xml.js";
+import "codemirror/mode/yaml/yaml.js";
+import "codemirror/mode/python/python.js";
+
+@customElement("pb-codemirror")
+export class CodeMirrorTextarea extends LitElement {
+    @property()
+    readOnly: boolean = false;
+
+    @property()
+    mode: string = "yaml";
+
+    editor?: CodeMirror.EditorFromTextArea;
+
+    createRenderRoot() {
+        return this;
+    }
+
+    firstUpdated() {
+        const textarea = this.querySelector("textarea");
+        if (!textarea) {
+            return;
+        }
+        this.editor = CodeMirror.fromTextArea(textarea, {
+            mode: this.mode,
+            theme: "monokai",
+            lineNumbers: false,
+            readOnly: this.readOnly,
+            autoRefresh: true,
+        });
+        this.editor.on("blur", (e) => {
+            this.editor?.save();
+        });
+    }
+}