Dockerfile

# syntax=docker/dockerfile:1
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### IMAGE: nerdware/lambda-push-notification-service
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# base

# This build stage sets values and files common to all build stages
# Source image repo: https://gallery.ecr.aws/lambda/nodejs
FROM public.ecr.aws/lambda/nodejs:16 as base

# Expose desired port
EXPOSE 8080

# Explicitly set workdir
WORKDIR ${LAMBDA_TASK_ROOT}

# Copy over package.json files
COPY package*.json ${LAMBDA_TASK_ROOT}/

#---------------------------------------------------------------------
# builder

# This build stage creates the build/ artifact for "prod" build stage
FROM base as builder

# Copy over the tsconfigs
COPY tsconfig*.json ${LAMBDA_TASK_ROOT}/

# Copy over src files
COPY src ${LAMBDA_TASK_ROOT}/src/

# Install all dependencies
RUN npm ci

# Create function/ for "prod" stage
RUN npm run build

#---------------------------------------------------------------------
# prod

# This build stage is what ultimately gets saved as the prod Lambda fn
FROM base as prod

# Copy over only the files needed in production
COPY --from=builder ${LAMBDA_TASK_ROOT}/function ${LAMBDA_TASK_ROOT}/function/

# Install only the necessary dependencies
RUN npm ci --omit=dev

# The Lambda handler function must be the CMD instruction
CMD [ "index.handler" ]

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