get docker deploy working

Dockerfile

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+# The default deploy instructions (https://biffweb.com/docs/reference/production/) don't
+# use Docker, but this file is provided in case you'd like to deploy with containers.
+#
+# When running the container, make sure you set any environment variables defined in config.env,
+# e.g. using whatever tools your deployment platform provides for setting environment variables.
+#
+# Run these commands to test this file locally:
+#
+#   docker build -t your-app .
+#   docker run --rm -e BIFF_PROFILE=dev -v $PWD/config.env:/app/config.env your-app
+
+# This is the base builder image, construct the jar file in this one
+# it uses alpine for a small image
+FROM clojure:temurin-21-tools-deps-alpine AS jre-build
+
+# Install the missing packages and applications in a single layer
+RUN apk add curl rlwrap
+
+WORKDIR /app
+COPY deps.edn ./
+RUN clj -P
+COPY build.clj config.edn ./
+COPY src ./src
+
+# construct the application jar
+RUN clj -T:build uber  && cp target/micro-blog-standalone.jar ./app.jar && rm -r target
+
+# This stage (see multi-stage builds) is a bare Java container
+# copy over the uberjar from the builder image and run the application
+FROM eclipse-temurin:21-alpine
+WORKDIR /app
+
+# Take the uberjar from the base image and put it in the final image
+COPY --from=jre-build /app/app.jar /app/app.jar
+COPY --from=jre-build /app/config.edn /app/
+
+EXPOSE 8080
+
+# By default, run in PROD profile
+# ENV BIFF_PROFILE=prod
+ENV HOST=0.0.0.0
+ENV PORT=8080
+CMD ["/opt/java/openjdk/bin/java", "-XX:-OmitStackTraceInFastThrow", "-XX:+CrashOnOutOfMemoryError", "-jar", "app.jar"]