added repos to readme

README.md

 # For common users:
 Set the needed variables in .env (take librephotos.env as model)
-Just pull the repo and run
+Clone the repo: `git clone git@github.com:LibrePhotos/librephotos-docker.git`
 docker-compose up -d
 This will get the pre-built images and start all the needed processes
 
 # For developers:
 Set the needed variables in .evn (take librephotos.env as model)
 Also set the codedir variable that tells docker where your source folder are
-Pull frontend code into ${codedir}/frontend/
-Pull backend code into ${codedir}/backend/
+Pull frontend code with `git clone https://github.com/LibrePhotos/librephotos-frontend.git ${codedir}/frontend/`
+Pull backend code into `git clone https://github.com/LibrePhotos/librephotos.git ${codedir}/backend/`
 Pull this repo and run
 docker-compose -f docker-compose.yml -f docker-compose.dev.yml up -d
 This will build images from scratch (can take a long time)
@@ -18,4 +18,4 @@ N.B. If you already built this image once, when you do changes you have to run
 docker-compose build --no-cache frontend
 docker-compose build --no-cache backend
 
-based on which one you changed if these changes need rebuild as for added dependencies/libraries etc.
\ No newline at end of file
+based on which one you changed if these changes need rebuild as for added dependencies/libraries etc.