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Use multi-stage Docker build #9

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Use multi-stage Docker build #9

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55 changes: 23 additions & 32 deletions Dockerfile
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Original file line number Diff line number Diff line change
@@ -1,26 +1,6 @@
FROM debian:stable-slim
FROM eclipse-temurin:11-jdk-focal as builder
USER root

# Copy the project code to app dir
COPY . /app

# Install OpenJDK-11 (earliest JDK kobweb can run on)
RUN apt-get update \
&& apt-get install -y openjdk-11-jdk \
&& apt-get install -y ant \
&& apt-get clean

# Fix certificate issues
RUN apt-get update \
&& apt-get install ca-certificates-java \
&& apt-get clean \
&& update-ca-certificates -f

# Setup JAVA_HOME -- needed by kobweb / gradle
ENV JAVA_HOME /usr/lib/jvm/java-11-openjdk-amd64/
RUN export JAVA_HOME
RUN java -version

# Add Chrome (for export)
RUN apt-get update \
&& apt-get install -y \
Expand All @@ -44,25 +24,36 @@ RUN apt-get update \
--no-install-recommends

# Install kobweb
RUN apt-get update && apt-get install -y wget unzip
RUN curl -O -L https://github.com/varabyte/kobweb/releases/download/cli-v0.9.7/kobweb-0.9.7.tar \
&& tar xf kobweb-0.9.7.tar \
&& rm -r kobweb-0.9.7.tar
ENV PATH="/kobweb-0.9.7/bin:${PATH}"

RUN wget https://github.com/varabyte/kobweb/releases/download/v0.7.7/kobweb-0.7.7.zip \
&& unzip kobweb-0.7.7.zip \
&& rm -r kobweb-0.7.7.zip
ENV PATH="/kobweb-0.7.7/bin:${PATH}"
RUN echo $PATH
# Copy the project code to app dir
COPY . /app

WORKDIR /app

RUN ./gradlew --stop && kobweb export --mode dumb

FROM eclipse-temurin:11-jre-focal
USER root

# Install kobweb
RUN curl -O -L https://github.com/varabyte/kobweb/releases/download/cli-v0.9.7/kobweb-0.9.7.tar \
&& tar xf kobweb-0.9.7.tar \
&& rm -r kobweb-0.9.7.tar
ENV PATH="/kobweb-0.9.7/bin:${PATH}"

# copy exported project code from builder image
COPY --from=builder /app /app
WORKDIR /app

ENV PORT=8080
EXPOSE $PORT

# Purge all the things we don't need anymore

RUN apt-get purge --auto-remove -y curl gnupg wget unzip \
&& rm -rf /var/lib/apt/lists/*
# preload the gradle binary
RUN ./gradlew --stop

# Keep container running because `kobweb run --mode dumb` doesn't block
CMD ./gradlew --stop && kobweb run --mode dumb --env prod && ./gradlew --stop && tail -f /dev/null
CMD kobweb run --mode dumb --env prod && tail -f /dev/null