[Core] Updated the README for docker env build.

Dockerfile-admin

@@ -18,7 +18,7 @@ RUN go build -v
 
 FROM alpine
 
-RUN apk add --no-cache openssl
+RUN apk add --no-cache openssl ca-certificates
 
 EXPOSE 8081
 

README.md

@@ -27,6 +27,22 @@ Use `docker-compose build`, then `docker-compose up` to launch the infrastructur
 After booting, you'll be able to reach the main interface at:
 <http://localhost:8042/> and the admin one at: <http://localhost:8081/>.
 
+#### Import folder
+
+##### Local import folder
+The following changes is only required if your are trying to change the local import folder `~/fic` location.
+
+Make the following changes inside this file `docker-compose.yml`:
+
+    23    volumes:
+    24 -     - ~/fic:/mnt/fic:ro
+    24 +     - <custom-path-to-import-folder>/fic:/mnt/fic:ro
+
+##### Owncloud import folder
+If your are trying to use the folder available with the Owncloud service, make the following changes inside this file `docker-compose.yml`:
+
+    29 -    command: --baseurl /admin/ -localimport /mnt/fic -localimportsymlink
+    29 +    command: --baseurl /admin/ -clouddav=https://owncloud.srs.epita.fr/remote.php/webdav/FIC%202019/ -clouduser <login_x> -cloudpass '<passwd>'
 
 ### Manual builds