fix: availability of env variables

entrypoint.sh

@@ -0,0 +1,20 @@
+#!/bin/sh
+
+keys="SERVERADDRESS IMPRINTLINK PRIVACYLINK CUSTOMLOGINMESSAGE"
+
+# Replace env vars in files served by NGINX
+for file in /usr/share/nginx/html/assets/config-*.js
+do
+  echo "Processing $file ...";
+  for key in $keys
+  do
+    # Get environment variable
+    value=$(eval echo "\$$key")
+    echo "replace $key by $value"
+
+    # replace __[variable_name]__ value with environment variable
+    sed -i 's|__'"$key"'__|'"$value"'|g' $file
+  done
+done
+
+nginx -g 'daemon off;'