Fly Secrets not populated during build

[kingofburden]

the working topic example where I answered

Deployment failing in github actions, unable to pass env to deploy command

An example of React app build with Dockerfile nginx and flyctl github actions Dockerfile FROM node:17-alpine as build WORKDIR /app ARG REACT_APP_SUPABASE_URL ARG REACT_APP_SUPABASE_ANON_KEY ARG REACT_APP_BACKEND_URL ENV REACT_APP_SUPABASE_URL=$REACT_APP_SUPABASE_URL ENV REACT_APP_SUPABASE_ANON_KEY=$REACT_APP_SUPABASE_ANON_KEY ENV REACT_APP_BACKEND_URL=$REACT_APP_BACKEND_URL ARG NODE_ENV=production RUN echo ${NODE_ENV} COPY package*.json ./ RUN npm install COPY . . RUN npm run build FROM …