fix env deploy

.gitea/workflows/rebuild-prod.yaml

@@ -49,13 +49,24 @@ jobs:
           echo "STACK_ID=$STACK_ID" >> $GITHUB_ENV
           echo "Got stack ID: $STACK_ID matched with Endpoint ID: $ENDPOINT_ID"
 
+      - name: Fetch Stack
+        run: |
+          # Get the stack details (including env vars)
+          STACK_DETAILS=$(curl -s -H "X-API-Key: $PORTAINER_TOKEN" "$PORTAINER_API_URL/stacks/$STACK_ID")
+          
+          # Extract environment variables from the stack
+          echo "$STACK_DETAILS" | jq -r '.Env' > stack_env.json
+          
+          echo "Existing stack environment variables:"
+          cat stack_env.json
+
       - name: Redeploy stack in Portainer
         run: |
           # Read stack file content
           STACK_FILE_CONTENT=$(echo "$(<prod-compose.yml )")
 
-          # Parse .env file into JSON array format for Portainer
-          ENV_VARS=$(cat .env | grep -v '^#' | grep -v '^$' | jq -R -s -c 'split("\n") | map(select(length > 0)) | map(split("=") | {name: .[0], value: (.[1:] | join("="))}) | map(select(.name != ""))')
+          # Read existing environment variables from the fetched stack
+          ENV_VARS=$(cat stack_env.json)
 
           # Prepare JSON payload with environment variables
           JSON_PAYLOAD=$(jq -n --arg stackFileContent "$STACK_FILE_CONTENT" --argjson pullImage true --argjson env "$ENV_VARS" \