Allow env variable for fernet key

Author: manelpb

root/etc/cont-init.d/30-config

@@ -2,8 +2,14 @@
 
 # generate fernet key for ldap if it doesn't exist
 if grep -q 'REPLACEWITHFERNETKEY' /app/ldap-backend-app.py; then
-    FERNETKEY=$(python3 /app/fernet-key.py)
-    sed -i "s/REPLACEWITHFERNETKEY/${FERNETKEY}/" /app/ldap-backend-app.py
-    sed -i "s/REPLACEWITHFERNETKEY/${FERNETKEY}/" /app/nginx-ldap-auth-daemon.py
-    echo "generated fernet key"
+    if [[ -z "${FERNETKEY}" ]]; then
+        KEY=$(python3 /app/fernet-key.py)
+        echo "generated fernet key"
+    else
+        KEY="b'${FERNETKEY}'"
+        echo "using FERNETKEY from env variable"
+    fi
+    
+    sed -i "s/REPLACEWITHFERNETKEY/${KEY}/" /app/ldap-backend-app.py
+    sed -i "s/REPLACEWITHFERNETKEY/${KEY}/" /app/nginx-ldap-auth-daemon.py    
 fi