Initial commit: Better Ender Chests mod for NeoForge 1.21.1

Dockerfile

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+FROM eclipse-temurin:21-jdk-alpine AS builder
+
+WORKDIR /app
+
+# Install dependencies
+RUN apk add --no-cache curl unzip
+
+# Copy project files
+COPY gradle.properties settings.gradle build.gradle ./
+COPY src ./src
+
+# Download and setup Gradle
+RUN curl -L -o gradle.zip https://services.gradle.org/distributions/gradle-8.10-bin.zip && \
+    unzip -q gradle.zip && \
+    rm gradle.zip && \
+    mv gradle-8.10 gradle
+
+# Create empty gradle home to avoid permission issues
+RUN mkdir -p /root/.gradle
+
+# Build the mod
+RUN ./gradle/bin/gradle build --no-daemon -x test || (cat /app/build/reports/problems/problems-report.html 2>/dev/null && exit 1)
+
+# Output stage - copy artifacts
+FROM alpine:latest
+WORKDIR /output
+COPY --from=builder /app/build/libs/*.jar ./
+CMD ["ls", "-la", "/output/"]