fixing standalone template

Dockerfile

@@ -1,5 +1,10 @@
 FROM node:19 as chatui-builder
 
+ARG MODEL_NAME
+ARG MODEL_PARAMS
+ARG APP_COLOR
+ARG APP_NAME
+
 WORKDIR /app
 
 RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
@@ -17,16 +22,12 @@ COPY .env.local.template .env.local.template
 RUN mkdir defaults
 ADD defaults /defaults
 RUN chmod -R 777 /defaults
-RUN --mount=type=secret,id=MODEL_NAME,mode=0444 \
-    --mount=type=secret,id=MODEL_PARAMS,mode=0444 \
-    --mount=type=secret,id=MONGODB_URL,mode=0444 \
-    --mount=type=secret,id=APP_COLOR,mode=0444 \
-    --mount=type=secret,id=APP_NAME,mode=0444 \
-    MODEL_NAME=$(cat /run/secrets/MODEL_NAME 2> /dev/null | grep '^' || cat /defaults/MODEL_NAME) && export MODEL_NAME \
-    && MODEL_PARAMS=$(cat /run/secrets/MODEL_PARAMS 2> /dev/null | grep '^' ||cat  /defaults/MODEL_PARAMS) && export MODEL_PARAMS \
+RUN --mount=type=secret,id=MONGODB_URL,mode=0444 \
+    "${MODEL_NAME:="${cat /defaults/MODEL_NAME}"}" && export MODEL_NAME \
+    "${MODEL_PARAMS:="${cat /defaults/MODEL_PARAMS}"}" && export MODEL_PARAMS \
+    "${APP_COLOR:="${cat /defaults/APP_COLOR}"}" && export APP_COLOR \
+    "${APP_NAME:="${cat /defaults/APP_NAME}"}" && export APP_NAME \
     && MONGODB_URL=$(cat /run/secrets/MONGODB_URL 2> /dev/null | grep '^' || cat /defaults/MONGODB_URL) && export MONGODB_URL \
-    && APP_COLOR=$(cat /run/secrets/APP_COLOR 2> /dev/null | grep '^' || cat /defaults/APP_COLOR) && export APP_COLOR \
-    && APP_NAME=$(cat /run/secrets/APP_NAME 2> /dev/null | grep '^' || cat /defaults/APP_NAME) && export APP_NAME \
     && envsubst < ".env.local.template" > ".env.local" \ 
     && rm .env.local.template
 
@@ -55,16 +56,12 @@ COPY entrypoint.sh.template entrypoint.sh.template
 RUN mkdir defaults
 ADD defaults /defaults
 RUN chmod -R 777 /defaults
-RUN --mount=type=secret,id=MODEL_NAME,mode=0444 \
-    --mount=type=secret,id=MODEL_PARAMS,mode=0444 \
-    --mount=type=secret,id=MONGODB_URL,mode=0444 \
-    --mount=type=secret,id=APP_COLOR,mode=0444 \
-    --mount=type=secret,id=APP_NAME,mode=0444 \
-    MODEL_NAME=$(cat /run/secrets/MODEL_NAME 2> /dev/null | grep '^' || cat /defaults/MODEL_NAME) && export MODEL_NAME \
-    && MODEL_PARAMS=$(cat /run/secrets/MODEL_PARAMS 2> /dev/null | grep '^' ||cat  /defaults/MODEL_PARAMS) && export MODEL_PARAMS \
+RUN --mount=type=secret,id=MONGODB_URL,mode=0444 \
+    "${MODEL_NAME:="${cat /defaults/MODEL_NAME}"}" && export MODEL_NAME \
+    "${MODEL_PARAMS:="${cat /defaults/MODEL_PARAMS}"}" && export MODEL_PARAMS \
+    "${APP_COLOR:="${cat /defaults/APP_COLOR}"}" && export APP_COLOR \
+    "${APP_NAME:="${cat /defaults/APP_NAME}"}" && export APP_NAME \
     && MONGODB_URL=$(cat /run/secrets/MONGODB_URL 2> /dev/null | grep '^' || cat /defaults/MONGODB_URL) && export MONGODB_URL \
-    && APP_COLOR=$(cat /run/secrets/APP_COLOR 2> /dev/null | grep '^' || cat /defaults/APP_COLOR) && export APP_COLOR \
-    && APP_NAME=$(cat /run/secrets/APP_NAME 2> /dev/null | grep '^' || cat /defaults/APP_NAME) && export APP_NAME \
     && envsubst < "entrypoint.sh.template" > "entrypoint.sh" \
     && rm entrypoint.sh.template