Duplicate WORKDIR at Dockerfile

[ajutamangdev]

Is there an existing issue for this?

• I have searched the existing issues.

Current Behavior

# Build
FROM golang:1.21-alpine AS build-env
RUN apk add build-base
WORKDIR /app
COPY . /app
WORKDIR /app # duplicated app WORKDIR here
RUN go mod download
RUN go build ./cmd/nuclei

# Release
FROM alpine:3.18.6
RUN apk upgrade --no-cache \
    && apk add --no-cache bind-tools chromium ca-certificates
COPY --from=build-env /app/nuclei /usr/local/bin/

ENTRYPOINT ["nuclei"]

Expected Behavior

# Build
FROM golang:1.21-alpine AS build-env
RUN apk add build-base
WORKDIR /app
COPY . /app
RUN go mod download
RUN go build ./cmd/nuclei

# Release
FROM alpine:3.18.6
RUN apk upgrade --no-cache \
    && apk add --no-cache bind-tools chromium ca-certificates
COPY --from=build-env /app/nuclei /usr/local/bin/

ENTRYPOINT ["nuclei"]

Steps To Reproduce

• Build the docker image locally
• docker build -t nuclei .
• Logs will showcase the duplicate work directory

Relevant log output

=> CACHED [build-env 2/7] RUN apk add build-base                                                                                              0.0s
 => CACHED [build-env 3/7] WORKDIR /app                                                                                                        0.0s
 => CACHED [build-env 4/7] COPY . /app                                                                                                         0.0s
 => CACHED [build-env 5/7] WORKDIR /app                                                                                                        0.0s
 => CACHED [build-env 6/7] RUN go mod download                                                                                                 0.0s
 => CACHED [build-env 7/7] RUN go build ./cmd/nuclei    

Environment

OS: Ubuntu 24.04.1 LTS