added openspeedtest (#834)

* added openspeedtest

* changed default version to speedtest

* suggested fixes

* add formatting

* fixed replacement issues

public/v4/apps/openspeedtest.yml

@@ -0,0 +1,24 @@
+captainVersion: 4
+
+services:
+    '$$cap_appname':
+        image: index.docker.io/openspeedtest/latest:$$cap_openspeedtest_version
+        caproverExtra:
+            containerHttpPort: '3001'
+        restart: always
+
+caproverOneClickApp:
+    variables:
+        - id: '$$cap_openspeedtest_version'
+          label: OpenSpeedTest Version
+          defaultValue: 'speedtest'
+          description: Check out their Docker page for the valid tags https://hub.docker.com/r/openspeedtest/latest/tags
+    instructions:
+        start: |-
+            OpenSpeedTest is a self-hosted speedtest. You can read more about this on https://openspeedtest.com/selfhosted-speedtest.
+        end: |-
+            OpenSpeedTest has been successfully deployed! You must enable https for the app to work. Go to the app setting and enable https.
+    displayName: OpenSpeedTest
+    isOfficial: true
+    description: |-
+        OpenSpeedTest is a self-hosted network speedtest written in vanilla Javascript.