backend redesign

flink/Dockerfile

@@ -0,0 +1,37 @@
+# Stage 1: Build the JAR
+FROM maven:3.9-eclipse-temurin-11 AS builder
+
+WORKDIR /build
+
+# Copy pom.xml and protobuf definitions first for better caching
+COPY pom.xml .
+COPY protobuf ../protobuf/
+
+# Download dependencies (cached if pom.xml doesn't change)
+RUN mvn dependency:go-offline
+
+# Copy source code
+COPY src ./src
+
+# Build the JAR
+RUN mvn clean package -DskipTests
+
+# For dev environment: replace topics.yaml with topics-dev.yaml in the JAR
+# This avoids replication factor errors with only 1 Kafka broker
+RUN mkdir -p /tmp/jar-overlay && \
+    cp /build/src/main/resources/topics-dev.yaml /tmp/jar-overlay/topics.yaml && \
+    cd /tmp/jar-overlay && \
+    jar uf /build/target/trading-flink-1.0-SNAPSHOT.jar topics.yaml
+
+# Stage 2: Create the Flink runtime image
+FROM flink:1.20.0-java11
+
+# Copy the built JAR to the Flink lib directory
+COPY --from=builder /build/target/trading-flink-1.0-SNAPSHOT.jar /opt/flink/usrlib/trading-flink.jar
+
+# Copy configuration files
+COPY config.example.yaml /opt/flink/conf/app-config.yaml
+
+# Set the entrypoint to use Application mode
+# The job will auto-submit on startup
+USER flink