Merge pull request #27 from bentolor/build/reduce-image-size

build(Dockerfile): reduce image size from 2G GB to ~0.4GB

Author: Bernhard B

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.13-buster
+FROM golang:1.13-buster AS buildcontainer
 
 ARG SIGNAL_CLI_VERSION=0.6.8
 ARG SWAG_VERSION=1.6.7
@@ -29,10 +29,7 @@ RUN cd /tmp/ \
 	&& git checkout v${SIGNAL_CLI_VERSION} \
 	&& ./gradlew build \
 	&& ./gradlew installDist \
-	&& ln -s /tmp/signal-cli-${SIGNAL_CLI_VERSION}/build/install/signal-cli/bin/signal-cli /usr/bin/signal-cli
-
-RUN mkdir -p /signal-cli-config/
-RUN mkdir -p /home/.local/share/signal-cli
+	&& ln -s /tmp/signal-cli-${SIGNAL_CLI_VERSION}/build/install/signal-cli/ /tmp/signal-cli
 
 COPY src/api /tmp/signal-cli-rest-api-src/api
 COPY src/main.go /tmp/signal-cli-rest-api-src/
@@ -41,7 +38,15 @@ COPY src/go.sum /tmp/signal-cli-rest-api-src/
 
 RUN cd /tmp/signal-cli-rest-api-src && swag init && go build
 
-ENV PATH /tmp/signal-cli-rest-api-src/:/usr/bin/signal-cli-${SIGNAL_CLI_VERSION}/bin/:$PATH
+# Start a fresh container for release container
+FROM adoptopenjdk:11-jre-hotspot
+
+COPY --from=buildcontainer /tmp/signal-cli-rest-api-src/signal-cli-rest-api /usr/bin/signal-cli-rest-api
+COPY --from=buildcontainer /tmp/signal-cli /opt/signal-cli
+
+RUN ln -s /opt/signal-cli/bin/signal-cli /usr/bin/signal-cli
+RUN mkdir -p /signal-cli-config/
+RUN mkdir -p /home/.local/share/signal-cli
 
 EXPOSE 8080