feat: added support to Docker secrets

Dockerfile

@@ -20,6 +20,7 @@ EXPOSE 139 445
 
 ENV USER "samba"
 ENV PASS "secret"
+ENV PASS_SECRETFILE=/run/secrets/pass
 ENV UID 1000
 ENV GID 1000
 ENV RW true

readme.md

@@ -29,7 +29,13 @@ services:
       - 445:445
     volumes:
       - /home/example:/storage
+    secrets:
+      - pass
     restart: on-failure
+
+secrets:
+  pass:
+    file: ./samba_pass.txt
 ```
 
 Via Docker CLI:
@@ -46,6 +52,8 @@ docker run -it --rm -p 445:445 -e "USER=samba" -e "PASS=secret" -v "/home/exampl
 
     You can set `UID` and `GID` environment variables to change the user/group id's, and set `RW: false` to make the share read-only.
 
+    You can set a different path for the pass file, by changing the variable `PASS_SECRETFILE`. Have in mind that passsing the secret it will override the `PASS` value.
+
     If you need more advanced features, you can modify the [smb.conf](https://github.com/dockur/samba/blob/master/smb.conf) file in this repo, and bind mount it to the container like this:
 
     ```yaml

samba.sh

@@ -70,6 +70,11 @@ else
     fi
 fi
 
+# Check if the secret file exists and if its size is greater than zero
+if [ -s "$PASS_SECRETFILE" ]; then
+  PASS=$(cat "$PASS_SECRETFILE")
+fi
+
 # Change Samba password
 echo -e "$PASS\n$PASS" | smbpasswd -a -c "$config" -s "$USER" > /dev/null || { echo "Failed to change Samba password for $USER"; exit 1; }