Simplify installation scripts and update dev.md with instructions of how to use them
diff --git a/dev/install_core_services.sh b/dev/install_core_services.sh
index 0a7601f..1ab542a 100755
--- a/dev/install_core_services.sh
+++ b/dev/install_core_services.sh
@@ -1,6 +1,7 @@
 #!/bin/sh
 
-ROOT="$(dirname -- $(pwd))"
+ROOT=$(pwd)
+ROOT=${ROOT%/pcloud*}/pcloud
 
 # Dgraph
 source $ROOT/apps/dgraph/install.sh