Add GitLab CI, Dockerfile, and demo-1

* Configured GitLab CI for Docker image builds and added a Dockerfile with the necessary setup for the main website and demo-1.
* Updated URL and removed duplicate entry in `demos.ts` to resolve conflicts.
* Integrated `.run` configuration for lawfirm-demo1 to streamline local development.

.run/lawfirm-demo1.run.xml

@@ -0,0 +1,14 @@
+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="lawfirm-demo1" type="js.build_tools.npm">
+    <package-json value="$PROJECT_DIR$/lawfirm-demos/demo-1/package.json" />
+    <command value="run" />
+    <scripts>
+      <script value="dev" />
+    </scripts>
+    <node-interpreter value="project" />
+    <envs>
+      <env name="PORT" value="5101" />
+    </envs>
+    <method v="2" />
+  </configuration>
+</component>