Added check if patch has already been done

install.sh

@@ -1,5 +1,7 @@
 #!/bin/bash
 
+FILE=OO_PubKey
+if test -f "$FILE"; then
     apt-get update && apt-get install -y python3.6-dev 
     wget https://bootstrap.pypa.io/get-pip.py
     python3.6 get-pip.py
@@ -87,4 +89,6 @@ python3.6 index.py
     echo Patching docservice and convert...
 
     echo Done! Running Document Server...
+fi
+
 /app/ds/run-document-server.sh