fix submodule, add instructions

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "logos"]
+	path = logos
+	url = https://github.com/NX211/homer-icons.git

README.md

@@ -1,5 +1,12 @@
 # singlefiledash
 
-Single file dashboard for applications
-
-Displays load time of the dashboard and uptime of applications.
+Single file dashboard for applications
+
+Displays load time of the dashboard and uptime of applications.
+
+```
+https://git.myco.systems/mycosystems/singlefiledash.git
+```
+```
+git submodule update --init --recursive
+```