The file /index.html is missing. error when building in docker container

[stefaanMLB]

I'm building a backend Nestjs project and a frontend Quasar SPA project into one docker container.
The backend serves the frontend, one less container to care about.
This used to work just fine in the past, with Quasar v2, I get the below error. The frontend build runs fine on my development machine.

App • ⚠️  The file /index.html is missing. Please add it back.
App • ⚠️   FAIL  Files validation not passed successfully

The version info

Build mode............. spa
Pkg quasar............. v2.16.4
Pkg @quasar/app-vite... v1.9.3
Pkg vite............... v2.9.18
Debugging.............. no
Publishing............. no

This is the dockerfile, the build fails at the npm run build step

# Global ARGs, must be defined before the first stage !
ARG BUILD_DIR="/tmp/build"
ARG AP="/usr/bruyland"

FROM node:18.20-alpine as base
FROM base AS builder

ARG BUILD_DIR 
# Set the working directory
WORKDIR ${BUILD_DIR}

# Copy source code into build container
COPY ./backend/*.js* ./backend/
COPY ./backend/src/ ./backend/src/
COPY ./frontend/*.js* ./frontend/
COPY ./frontend/src/ ./frontend/src/
COPY ./frontend/public/favicon.ico ./frontend/public/favicon.ico
# `models` files must be copied frontend to backend (is a folder symlink in dev environment)
COPY ./frontend/src/models/ ./backend/src/models/

# install node packages and build BACKEND
WORKDIR ${BUILD_DIR}/backend/
RUN npm set progress=false && npm config set depth 0 && \
  npm ci && npm cache clean --force && \
  npm run build && \
  npm prune --production

  # install node packages and build FRONTEND
WORKDIR ${BUILD_DIR}/frontend
RUN npm ci && npm run build

# ---- build the release container ----
FROM base as release
# setup timezone Europe/Brussels
RUN ln -sf /usr/share/zoneinfo/Europe/Brussels /etc/localtime

# copying the arguments into the current container
ARG BUILD_DIR
ARG COMMIT
ARG TAG
ARG AP

# Print important parameter values
RUN echo COMMIT=$COMMIT
RUN echo TAG=$TAG
RUN echo AP=$AP
RUN echo BUILD_DIR=$BUILD_DIR

# Set the working directory
WORKDIR ${AP}

COPY --from=builder ${BUILD_DIR}/backend/dist ${AP}/dist
COPY --from=builder ${BUILD_DIR}/backend/static ${AP}/static
COPY --from=builder ${BUILD_DIR}/frontend/public/favicon.ico ${AP}/static
COPY --from=builder ${BUILD_DIR}/backend/node_modules ${AP}/node_modules
COPY --from=builder ${BUILD_DIR}/backend/package.json ${AP}

# Deault environment variables
ENV PORT=3000
ENV NODE_ENV=production
ENV COMMIT=$COMMIT
ENV TAG=$TAG

# Expose port
EXPOSE ${PORT}

# Volumes
VOLUME ["${AP}/config"]

# Change user
USER node

# Run the container under "node" user by default
CMD [ "node", "dist/main" ]

[stefanvanherwijnen]

COPY ./frontend/*.js* ./frontend/
COPY ./frontend/src/ ./frontend/src/
COPY ./frontend/public/favicon.ico ./frontend/public/favicon.ico
# `models` files must be copied frontend to backend (is a folder symlink in dev environment)
COPY ./frontend/src/models/ ./backend/src/models/

index.html is located in frontend/ so I guess you didn't copy it to the container?

[stefaanMLB]

You are right, that was the problem

[stefanvanherwijnen]

I just created a new Quasar CLI project and there is an index.html file in there, so I doubt it is created on the fly.

[stefaanMLB]

You are right, that was the problem